Suppose a scientist wants to test a new drug to fight the flu. The scientist injects the drug into three people with the flu. The scientist injects a harmless solution into three other people with the flu.|||The variable group is the drug.
The control is the people who get the harmless solution.|||Think of the harmless drug like a placebo, if that makes it easier... He is administering the drug this way so he can see whether or not the drug has any affect on the flu patients. Think of what he is changing in order to test the drug (the variable) and what he is holding constant; that should give you your answer...|||The control group is the harmless solution, and the variable group is the flu group.
Saturday, December 17, 2011
What are key institutions that the dominant or majority group must control in order to maintain its power.?
What are some key institutions that the dominant or majority group must control in order to maintain its power? I am having a little trouble here....|||The people, you have to get and maintain a good relationship with people to back you and help out, but you should be willing to 鈥?pay it forward 鈥?as well, within reason. Things like businesses and whatknot like I said STRIVE on good relationships, with other businesses, customers, etc. To help keep them afloat. Most businesses fail either due to horrible customer relations, which can lead to horrible customer feedback, and or they were a good company but the high ups got greedy and charged way too much or added bills or whatever..or new management came in and didnt follow the previous managements cues or completely flipped the business and not enough people bought into it. The people always are the key to me. You have to retain loyal customers, develope new ones, as well as look out for future acquisitions.|||There is only one institution to which, as you put it the dominant or majority group control and are doing it very effectively. This very day. It is being used in 1791 a very learned gentleman. I believe made a statement, " Allow me to issue and control a nation's currency on I care not who makes its laws" and that was made by a fairly prominent banker whose firm is still very active and very much in control along with about nine other people.The banks make the deals they control the Treasury who controls the government.Contrary to how people think the US Federal reserve is a private institution, The Bank of England is a private institution the Bundesbank in Germany is a private institution and et cetera and et cetera are all the big world banks are privately owned there is where your trouble will end or begin in understanding corporate world finance.
When doing an experiment, what is the difference between a control group & an experimental group?
Please give an example.|||Your control group is the thing you do not change.
The experimental group is the thing that you do change.
For example, if you are testing how sunlight affects plants your control group would be a plan getting the necessary sunlight to grow.
Your experimental group would be a plant getting too much sunlight, or a plant that does not get any sunlight at all.
The experimental group is the thing that you do change.
For example, if you are testing how sunlight affects plants your control group would be a plan getting the necessary sunlight to grow.
Your experimental group would be a plant getting too much sunlight, or a plant that does not get any sunlight at all.
How would a control group of athletes differ from the experimental group?
This ia a biology question i'm stuck with.|||the experimental group sees a change - say nutrition or exercise program
the control group stays the same.
the control group stays the same.
What is the definition of a control group and an experimental group?
Control group
In an experiment or clinical trial) a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
A control is as close to the experimental group as you can get, but doesn't receive what ever treatment the experimental group gets. If you had to many factors being used on an experimental group you would never know if the "treatment" was what was causing what ever effect took place.|||Control group is the group that is held constant and not experimented with. Experimental is the group tampered with.
In an experiment or clinical trial) a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
A control is as close to the experimental group as you can get, but doesn't receive what ever treatment the experimental group gets. If you had to many factors being used on an experimental group you would never know if the "treatment" was what was causing what ever effect took place.|||Control group is the group that is held constant and not experimented with. Experimental is the group tampered with.
How do experimental and control group affect in the experimental research?
These two groups are to show whether a particular drug or any other type of experiment affect the final outcome. For example, Cold Medicine may be given to people with Swine Flu, while the control group receives another substance to see if the outcome is for the better or worse.
What is experimental group and what is control group?
im doing a lab report and it says to describe the experimental group and control group, my lab report is over bacteria %26amp; disinfectants lab.....help!!!|||control group is under normal conditions, experimental group is with some variation you control|||The difference is that the experimental group you are trying something on such as the disinfectant on bacteria
The control group would just allow the bacteria to grow without the disinfectant|||Control group is the one that you don't change.
For example if you are doing a experiement on the affect of fertilizer on plant growth (sorry can't think of a better example) you will have one that has no fertilizer on it. This is the control and you do this to show that the plants aren't just growing well because of other conditions rather then your input variable/ independant (the fertilizer).
So logically the experiment group is the groups that you change the input variable. In the example I gave it would be the amount of fertilizer you put in.|||There is a person or persons doing the experiment.
The experimental group is the one on which the disinfectant will be used.
The control group is the one on which no disinfectant will be used.
The person(s) tabulating the results of the experiment must not know which is the experimental group and which is the control group so that this person(s) bias will not affect the observed results.|||Easy. The whole thing is part of the experiment. Whe you are testing a group of bacteria ( it must all be the same kind and simular in everyway.)
The bacteria is broken into 2 or 3 groups depending on your study. If it is only 2 groups , One group is the control group. This control group has NOTHING done to it. It is just to observe and compare with the second group, the experimental group. The experimental group is the one that gets tested or the one that things are applied to.
If it is a 3 group experiement there is 2 control groups(double blind groups) Hope this helps.|||The experimental group is the one that receives the treatment and the control group is not affected.
In your lab, the experimental group would receive the disinfectant and the control group would not. In this way you can observe what effects the specific disinfectant has on the bacteried judged by the control group.
The control group would just allow the bacteria to grow without the disinfectant|||Control group is the one that you don't change.
For example if you are doing a experiement on the affect of fertilizer on plant growth (sorry can't think of a better example) you will have one that has no fertilizer on it. This is the control and you do this to show that the plants aren't just growing well because of other conditions rather then your input variable/ independant (the fertilizer).
So logically the experiment group is the groups that you change the input variable. In the example I gave it would be the amount of fertilizer you put in.|||There is a person or persons doing the experiment.
The experimental group is the one on which the disinfectant will be used.
The control group is the one on which no disinfectant will be used.
The person(s) tabulating the results of the experiment must not know which is the experimental group and which is the control group so that this person(s) bias will not affect the observed results.|||Easy. The whole thing is part of the experiment. Whe you are testing a group of bacteria ( it must all be the same kind and simular in everyway.)
The bacteria is broken into 2 or 3 groups depending on your study. If it is only 2 groups , One group is the control group. This control group has NOTHING done to it. It is just to observe and compare with the second group, the experimental group. The experimental group is the one that gets tested or the one that things are applied to.
If it is a 3 group experiement there is 2 control groups(double blind groups) Hope this helps.|||The experimental group is the one that receives the treatment and the control group is not affected.
In your lab, the experimental group would receive the disinfectant and the control group would not. In this way you can observe what effects the specific disinfectant has on the bacteried judged by the control group.
What is the control group the same as? The independent or dependent variable?
the experimental group as well.|||Independent - Control
Dependent - Experimental
This can easily be remembered as the Independent variable is constant and "controls" the (depend)ent variable, that changes (depend)ing on the the control, thus making the Independent variable what you are experimenting.
Dependent - Experimental
This can easily be remembered as the Independent variable is constant and "controls" the (depend)ent variable, that changes (depend)ing on the the control, thus making the Independent variable what you are experimenting.
What is the control group in an experiment?
a. makes the experiment valid
b. is an additional replicate for statistical purposes
c. reduces the experimental errors
d. minimizes experimental inaccuracy
e. allows a standard of comparison for the experimental group|||E|||E. because the control group is the one that is like your basis of differentiating the experimebtal group from it|||E. It's the group you don't mess with so you can compare to see if your other variables had an effect.
b. is an additional replicate for statistical purposes
c. reduces the experimental errors
d. minimizes experimental inaccuracy
e. allows a standard of comparison for the experimental group|||E|||E. because the control group is the one that is like your basis of differentiating the experimebtal group from it|||E. It's the group you don't mess with so you can compare to see if your other variables had an effect.
Is there an easy way to determine if you're in the Control group in a drug test?
A few years ago, my wife was given the opportunity to participate in a drug trial. This was for an experimental medication that would have been helpful for her so long as she wasn't wasting her time on the placebo. Ultimately, we decided against participating because we did not trust the doctor and we did not want to go through all the trouble of commuting downtown every week when there was a 50% chance of taking the placebo.|||No, there's no easy way to tell.
The placebo effect happens because people have positive thoughts about the possible treatment they are receiving.
While I can certainly understand not wanting to drive or take the risk of getting the placebo, a double blind test is the only way to tell if a drug is effective or not.
And the placebo effect is very real. It's a testament to how positive thoughts can have a positive effect on the body.|||It depends on the drug being tested, but theoretically, you're not supposed to be able to tell.
Some active drugs will make you nauseated, euphoric, depressed, jittery, or some other side effect. If you experienced those effects, you'd know you had the active drug. Placebo shouldn't have any effects like th t (but people will still report them... shows what the power of thought will do to you!)
Some clinical trials do a crossover, so that people on the placebo and active drug switch. That makes each person his or her own control. Not all studies are set up that way, though.
It's too bad that the study didn't work out for you. Clincial trials often demand a lot in terms of time and effort in exchange for free medication and medical care. Sometimes even the control group does better because of all the close attention.
The placebo effect happens because people have positive thoughts about the possible treatment they are receiving.
While I can certainly understand not wanting to drive or take the risk of getting the placebo, a double blind test is the only way to tell if a drug is effective or not.
And the placebo effect is very real. It's a testament to how positive thoughts can have a positive effect on the body.|||It depends on the drug being tested, but theoretically, you're not supposed to be able to tell.
Some active drugs will make you nauseated, euphoric, depressed, jittery, or some other side effect. If you experienced those effects, you'd know you had the active drug. Placebo shouldn't have any effects like th t (but people will still report them... shows what the power of thought will do to you!)
Some clinical trials do a crossover, so that people on the placebo and active drug switch. That makes each person his or her own control. Not all studies are set up that way, though.
It's too bad that the study didn't work out for you. Clincial trials often demand a lot in terms of time and effort in exchange for free medication and medical care. Sometimes even the control group does better because of all the close attention.
Any ideas on what should be our control group? And our treatment group?
We are doing an experiment to discover if sugar augments short term memory. We really need help!|||Your control group could receive a placebo (e.g., a cookie prepared with a sugar substitute). Your experimental group receives a similar cookie, but one prepared in a traditional way (with sugar). Have both groups take a short term memory test both before and after the cookie. Then compare the results.
Good luck,
~Dr. B.~
Good luck,
~Dr. B.~
What is the control group and the controlled variables in this experiment?
Agricultural scientists were concerned about the effect of air pollution, sulfur dioxide in particular, on soybean production in fields adjacent to coal-powdered power plants. Based on initial investigations, they proposed that sulfur dioxide in high concentrations would reduce reproduction in soybeans. They designed a experiment to test this hypothesis. In this experiment 48 soybean plants, just beginning to produce flowers, were divided into two groups, treatment, and no treatment. The 24 treated were divided into four groups of 6. One group of 6 treated plants was placed in a fumigation chamber and exposed to 0.6 ppm of sulfur dioxide for 4 hours to stimulate sulfur dioxide emissions from a power plant. The experiment was repeated on the remaining three treated treated groups. The no-treatment plants were returned to the greenhouse. When the beans matured, the number of bean pods, the number of seeds per pod, and weight of pods were determined for each plant.|||The controlled variable is the exposure vs. non-exposure to sulfur dioxide. The control group i.e. the no-treatment plants, was not exposed to sulfur dioxide.
What is the control group of my science experiment?
What does the effect of salt have on the melting of ice.|||the control group would just be a piece of ice in a specific dish at the same temperature each time you perform the experiment. one thing too you may want to think about is to make the ice from the same amount of water. there's a lot of variables to think about like temperature, size of ice or water it's made from, the dish the ice sits in, etc.
good luck.|||Well any ice that DOES NOT have any salt on it is the control group (also known as placebo)|||The control would be where the dependent variable has a change of 0. You are testing whether salt affects the melting point, so the control is what the melting point is when there is no salt present.|||Set up 2 experiments, exactly the same. One add salt to the ice and the other, DONT add salt. then you monitor the melting rates of the ice in the two setups. The one without salt is the control. You'll compare the results of the experimental (with salt) to the control (no salt)
good luck.|||Well any ice that DOES NOT have any salt on it is the control group (also known as placebo)|||The control would be where the dependent variable has a change of 0. You are testing whether salt affects the melting point, so the control is what the melting point is when there is no salt present.|||Set up 2 experiments, exactly the same. One add salt to the ice and the other, DONT add salt. then you monitor the melting rates of the ice in the two setups. The one without salt is the control. You'll compare the results of the experimental (with salt) to the control (no salt)
What is a control group And scincetific Method?
I NEED to know what it is for my homework so PLEASE help me!!!!!!!|||the control group is the group in which a variable (the one being tested) is not manipulated. it is the group where you usually know what happens. for instance:
you have two cats that eat the same food and are the same breed age and gender. you buy new food for one and keep other on the same old food. the cat on the old food is the control.|||A group that is treated exactly the same as the experimental group. A scientific method refers to a body of techniques for investigating phenomena, aquireing new knowledge, or correcting and integrating previous knowledge.|||control group is when you do and experiment during the scientific method, two groups one called the CONTROL group does the experiment regular while the other group adds anything to it.|||7th grade math homework, am i right.
you have two cats that eat the same food and are the same breed age and gender. you buy new food for one and keep other on the same old food. the cat on the old food is the control.|||A group that is treated exactly the same as the experimental group. A scientific method refers to a body of techniques for investigating phenomena, aquireing new knowledge, or correcting and integrating previous knowledge.|||control group is when you do and experiment during the scientific method, two groups one called the CONTROL group does the experiment regular while the other group adds anything to it.|||7th grade math homework, am i right.
What's the difference between a control and a control group in biology?
Is there any difference? If so, what?|||Basically the same thing. When you study groups lets say certain drug in mice we have the treatment group and a control group as baseline to compare to treatment to see if there is effect. So geoups you use when you use more individuals
Now control you use for example a certain gens are found in your PCR product you always use a marker or control to see if your PCR was succesful usely GADPH (household gen has to with glucose breaking down). But also when you want to test if amylase breask down starch you use one starch with amylase group and one without.
So groups you use when you have groups and controls when you compare single factors
Now control you use for example a certain gens are found in your PCR product you always use a marker or control to see if your PCR was succesful usely GADPH (household gen has to with glucose breaking down). But also when you want to test if amylase breask down starch you use one starch with amylase group and one without.
So groups you use when you have groups and controls when you compare single factors
Did anyone see the independent voter control group results from the debate last night?
I missed the debate on TV and listened to it on the car radio. Did anyone pay attention to who the independents thought won the debate last night?|||The control groups on different stations produced different results as you can imagine. For instance on Fox the control group was overwhelmingly in favor of Palin, like 80-20. On CNN it was 50-30-20 for Biden. So depending on your perspective is what your take on the winner and loser is. What I did find compelling was the democrats immediately went into attack mode using phrases, like hokey, scripted, tight, uninformed, and when pressed on her presence, they admitted that she was relaxed, prepared, and confident. Which means, they really know she won, but would never admit to it.|||I did. You didn't miss anything important, that's for sure.....just that once again the media caters to idiots with a 56 IQ instead of to the general population. I wonder when the media will recognize that most Americans aren't stupid?
The sample size of the "independant", undecided "group" of voters was, at most, 10-15 people in a single room. That right there makes any results they presented thereafter completely statistically invalid, even assuming that those 15 people were indeed "undecided".
Having 15 people attempt to represent the views of over 100,000,000 voters is bordering on insanity if not completely irrelevant. I'm surprised they even ran that whole sham of a line-graph thing on TV at all.
I know I can decide for myself who I thought did a better job in the debate without needing to see what 15 other people may have thought. You can too. Hopefully some day the media can figure that out.|||Only a few people out of that group have now committed to one side or the other. Others are still undecided. And during the debate, the ratings were interesting. Lots of people liked Biden from undecided voters but his ratings also dropped when he carried on a little about nothing. And as for Palin, her ratings dropped BIGTIME when she said how she鈥檇 answer the question HER way and not the way the moderator or Biden wanted her to. And she babbled about her experience as opposed to answering the question. Ratings went from about 75 (from where Biden had just finished) and dropped as low as 40.
I know this is just a little mini consensus through that undecided group. But I found it VERY interesting! They seemed to be fairly split and were still undecided for the most part.
But it did say that both candidates were well liked and because of their debating, their ratings went up for that. Both increased 50% give or take.
I actually found the debate to be done very well. It was better than the Presidential that we had last week. (My opinion)
|||If you go by any poll you're crazy. They're all skewed toward the way that particular outlet wants it to go. For all you know they throw out some results so it goes a particular way. Go with what you feel and know. Also, do your own research through multiple sources and records. Don't just go with the flow....|||I don't know who you are referring to, however the only national poll reported thus far of UNCOMMITTED voters, a scientific random sample not some hokey unscientific TV nonsense, found that 46% thought Joe Biden did better, 21% thought Palin did better and 33% thought it was a tie.|||CNN had that squiggly line thing broken down to MEN and WOMEN.
Funny but to me it proved that WOMEN were the more intelligent of the species.
Men only reacted to Sarah Palin. Anything she said made that "line rise". Maybe that dial was attached to their little soldier.|||Depends on the station you watched.
The independants that Fox had on were about 75% for McCain after the debate.
The ones on CNN were 49% for McCain afterwards.
The Ones on MSNBC we 5% for McCain afterwards.|||nearly everyone thought Biden won the debate but Palin did well (beat expectations)
I watched ABC, NBC, and PBS. People on NPR this morning are also saying Biden won.|||All independent polls have shown Biden winning.
Also note of interest: the fox news poll which was put out to the country as a whole i think, not only independents, showed Biden winning|||Independents overwhelmingly thought Palin won it.|||The 3 white women supported and talk up Palin. The 1 black woman didn't. At least that is how it was on the Today show.|||I think they both did good. but Palin showed that she can handle VP and that she is NOT dumb!!|||Yes. They overwhelmingly thought Palin won.
The sample size of the "independant", undecided "group" of voters was, at most, 10-15 people in a single room. That right there makes any results they presented thereafter completely statistically invalid, even assuming that those 15 people were indeed "undecided".
Having 15 people attempt to represent the views of over 100,000,000 voters is bordering on insanity if not completely irrelevant. I'm surprised they even ran that whole sham of a line-graph thing on TV at all.
I know I can decide for myself who I thought did a better job in the debate without needing to see what 15 other people may have thought. You can too. Hopefully some day the media can figure that out.|||Only a few people out of that group have now committed to one side or the other. Others are still undecided. And during the debate, the ratings were interesting. Lots of people liked Biden from undecided voters but his ratings also dropped when he carried on a little about nothing. And as for Palin, her ratings dropped BIGTIME when she said how she鈥檇 answer the question HER way and not the way the moderator or Biden wanted her to. And she babbled about her experience as opposed to answering the question. Ratings went from about 75 (from where Biden had just finished) and dropped as low as 40.
I know this is just a little mini consensus through that undecided group. But I found it VERY interesting! They seemed to be fairly split and were still undecided for the most part.
But it did say that both candidates were well liked and because of their debating, their ratings went up for that. Both increased 50% give or take.
I actually found the debate to be done very well. It was better than the Presidential that we had last week. (My opinion)
|||If you go by any poll you're crazy. They're all skewed toward the way that particular outlet wants it to go. For all you know they throw out some results so it goes a particular way. Go with what you feel and know. Also, do your own research through multiple sources and records. Don't just go with the flow....|||I don't know who you are referring to, however the only national poll reported thus far of UNCOMMITTED voters, a scientific random sample not some hokey unscientific TV nonsense, found that 46% thought Joe Biden did better, 21% thought Palin did better and 33% thought it was a tie.|||CNN had that squiggly line thing broken down to MEN and WOMEN.
Funny but to me it proved that WOMEN were the more intelligent of the species.
Men only reacted to Sarah Palin. Anything she said made that "line rise". Maybe that dial was attached to their little soldier.|||Depends on the station you watched.
The independants that Fox had on were about 75% for McCain after the debate.
The ones on CNN were 49% for McCain afterwards.
The Ones on MSNBC we 5% for McCain afterwards.|||nearly everyone thought Biden won the debate but Palin did well (beat expectations)
I watched ABC, NBC, and PBS. People on NPR this morning are also saying Biden won.|||All independent polls have shown Biden winning.
Also note of interest: the fox news poll which was put out to the country as a whole i think, not only independents, showed Biden winning|||Independents overwhelmingly thought Palin won it.|||The 3 white women supported and talk up Palin. The 1 black woman didn't. At least that is how it was on the Today show.|||I think they both did good. but Palin showed that she can handle VP and that she is NOT dumb!!|||Yes. They overwhelmingly thought Palin won.
What is the dependant variable,independat variable and the control group?
bart beleives that mice exposed to radiowaves will become extra srong. he decides to perform this experiment by placing 10 mice that had not been exposed. his test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 mice could move the block. 7 out of 10 of the other mice couldnt.|||An independent variable is a factor that is manipulated in an experiment. The experimenter controls whether or not subjects are exposed to the independent variable. The dependent variable is measured to determine if the manipulation of the independent variable had any effect. For example, to test a hypothesis that eating carrots improves vision, the experimenter would manipulate whether or not subjects ate carrots. Thus, eating carrots is the independent variable. Each subject鈥檚 vision would be tested to see if carrot eating had any effect. Thus, vision is the dependent variable. The subjects assigned to eat carrots are in the experimental group, whereas subjects not eating carrots are in the control group.
What is the independent variable, dependent variable, constant and control group?
Pea plant clones are giving different amounts of water for a three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water; the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily.
Please Help!! Thank you so much (:|||The independent variable, that the experimenter has direct control over, is the amount of water the plants are given. The dependent varialble, which is influenced by/the result of the independent variable, is plant height. The control group is the group that you are not altering at all, the plants that receive water via natural means.|||Independent = the things you change to the group (so amount of water)
Dependent = the result
Constant = the group that continues to receive something.
Control = the group you're using to compare your experiment's result with.
Please Help!! Thank you so much (:|||The independent variable, that the experimenter has direct control over, is the amount of water the plants are given. The dependent varialble, which is influenced by/the result of the independent variable, is plant height. The control group is the group that you are not altering at all, the plants that receive water via natural means.|||Independent = the things you change to the group (so amount of water)
Dependent = the result
Constant = the group that continues to receive something.
Control = the group you're using to compare your experiment's result with.
Can someone please give me a simple biology experiment that contains a control group and experimental group?
it needs to be a interesting unique one that is also simple.thanks so much!|||Seed germination in light and dark( long thin white) is too simple? If not try lettuce seeds, they germinate easily.
Maybe cover germinating seeds with different foils or different coloured glasses?? Non unique I`m afraid.
How many seconds must one microwave bread to prevent mould? ( wet, closed container)
I will think further|||A scientific control augments integrity in experiments by isolating variables as dictated by the scientific method in order to make a conclusion about such variables. In a controlled experiment, two virtually identical experiments are conducted. In one of them, the treatment, the factor being tested is applied. In the other, the control, the factor being tested is not applied. Effects of the treatment are isolated by comparing outcomes in the two cases.
For example, in testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Doctors achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb researchers' bias and to isolate the effects of the drug.
Types of control group:
Negative control
A control sample where a negative result is expected, to help correlate a positive result with the variable being tested. Example: a measurement of background radiation when trying to test the effects of a certain substance on local radiation levels.
Positive control
A control sample that is known to produce a positive result if the test is working as expected. Example: printing a test page on a printer with its own driver software to test that it has been installed correctly, before testing the printing behaviour of another piece of software.
In the scientific method, an experiment is a set of observations performed in the context of solving a particular problem or question, to support or falsify a hypothesis or research concerning phenomena. The experiment is a cornerstone in the empirical approach to acquiring deeper knowledge about the physical world.
A control group study uses a control group to compare to an experimental group in a test of a causal hypothesis. The control and experimental groups must be identical in all relevant ways except for the introduction of a suspected causal agent into the experimental group. If the suspected causal agent is actually a causal factor of some event, then logic dictates that that event should manifest itself more significantly in the experimental than in the control group. For example, if 'C' causes 'E', when we introduce 'C' into the experimental group but not into the control group, we should find 'E' occurring in the experimental group at a significantly greater rate than in the control group. Significance is measured by relation to chance: if an event is not likely due to chance, then its occurrence is significant.
Maybe cover germinating seeds with different foils or different coloured glasses?? Non unique I`m afraid.
How many seconds must one microwave bread to prevent mould? ( wet, closed container)
I will think further|||A scientific control augments integrity in experiments by isolating variables as dictated by the scientific method in order to make a conclusion about such variables. In a controlled experiment, two virtually identical experiments are conducted. In one of them, the treatment, the factor being tested is applied. In the other, the control, the factor being tested is not applied. Effects of the treatment are isolated by comparing outcomes in the two cases.
For example, in testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Doctors achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb researchers' bias and to isolate the effects of the drug.
Types of control group:
Negative control
A control sample where a negative result is expected, to help correlate a positive result with the variable being tested. Example: a measurement of background radiation when trying to test the effects of a certain substance on local radiation levels.
Positive control
A control sample that is known to produce a positive result if the test is working as expected. Example: printing a test page on a printer with its own driver software to test that it has been installed correctly, before testing the printing behaviour of another piece of software.
In the scientific method, an experiment is a set of observations performed in the context of solving a particular problem or question, to support or falsify a hypothesis or research concerning phenomena. The experiment is a cornerstone in the empirical approach to acquiring deeper knowledge about the physical world.
A control group study uses a control group to compare to an experimental group in a test of a causal hypothesis. The control and experimental groups must be identical in all relevant ways except for the introduction of a suspected causal agent into the experimental group. If the suspected causal agent is actually a causal factor of some event, then logic dictates that that event should manifest itself more significantly in the experimental than in the control group. For example, if 'C' causes 'E', when we introduce 'C' into the experimental group but not into the control group, we should find 'E' occurring in the experimental group at a significantly greater rate than in the control group. Significance is measured by relation to chance: if an event is not likely due to chance, then its occurrence is significant.
How do you find the control group in this science experiment?
Dr. Palese placed eight guinea pigs in a temperature-controlled chamber, one of which was infected and the others were not. The number of guinea pigs that became infected was used to measure the rate of transmission. By varying air temperature in the guinea pigs鈥?quarters, they discovered that transmission was excellent at 41 degrees. It declined as the temperature rose until, by 86 degrees, the virus was not transmitted at all.
The animals also released viruses nearly two days longer at 41 degrees than at a typical room temperature of 68 degrees.|||The way it is described, there is no control group.
Now if the doctor had put a few guinea pigs, none of which were infected (*) in a chamber, and cycled the temperature the same way, that would have been a control group.
(*) Actually, we would _assume_ that none were infected. The testing for that would never be 100% accurate.|||The first response is correct. In this design there is no separate control group. It is known as a within-subjects design, where you put the same subject (animal, human, whatever you're testing) into different situations in which you change only a particular controlled aspect between the environments.
The animals also released viruses nearly two days longer at 41 degrees than at a typical room temperature of 68 degrees.|||The way it is described, there is no control group.
Now if the doctor had put a few guinea pigs, none of which were infected (*) in a chamber, and cycled the temperature the same way, that would have been a control group.
(*) Actually, we would _assume_ that none were infected. The testing for that would never be 100% accurate.|||The first response is correct. In this design there is no separate control group. It is known as a within-subjects design, where you put the same subject (animal, human, whatever you're testing) into different situations in which you change only a particular controlled aspect between the environments.
What is the independent variable, dependent variable and control group for these experiments?
Experiment 1
Females fed diets high in cholesterol produced more
eggs than those fed diets which contained low levels of
cholesterol.
Experiment 2
When cocklebur seeds were subjected to the heat
shock treatment, they germinated in 3 days. It took other seeds,
not subjected to this treatment, 45 days to germinate.
Experiment 3
Male canaries can be trained to imitate melodies
they hear. Female canaries were more likely to mate with males that
imitated heavy metal music than those who had not heard any music
at all.|||1.
independent: cholesterol level in diets
dependent: egg production
control: those who were fed a regular cholesterol diet
2.
independent= treatment vs no treatment
dependent= germination time
control = no treatment
3.
independent= music melodies
dependent= attractiveness to females
control= ones where no melodies were taught
Females fed diets high in cholesterol produced more
eggs than those fed diets which contained low levels of
cholesterol.
Experiment 2
When cocklebur seeds were subjected to the heat
shock treatment, they germinated in 3 days. It took other seeds,
not subjected to this treatment, 45 days to germinate.
Experiment 3
Male canaries can be trained to imitate melodies
they hear. Female canaries were more likely to mate with males that
imitated heavy metal music than those who had not heard any music
at all.|||1.
independent: cholesterol level in diets
dependent: egg production
control: those who were fed a regular cholesterol diet
2.
independent= treatment vs no treatment
dependent= germination time
control = no treatment
3.
independent= music melodies
dependent= attractiveness to females
control= ones where no melodies were taught
What is a control group and an experimental group in a science fair?
Plz help it's due tomorrow. Plz, Thx|||The control group is the baseline, or the group that does not get the experiment.
So, if you were showing the affect of light on plant growth, the control group is the plant without the light, and the experimental group is the plant with the light.|||The control group is NOT the same as the control variable. Get your facts straight!!!
|||thats the same as the control variable which is the one that stays the same somehting thsat doesnt change. Like how it would be if u dnt do anything to the thing(w.e. ur testing) nd The experimental group is the MV and RV . MV= manipulated variable is what u change and RV= responding variable. When u change something (this something would be the mv) sometihng(RV) happens the rv is kind of the result of the mv...
So, if you were showing the affect of light on plant growth, the control group is the plant without the light, and the experimental group is the plant with the light.|||The control group is NOT the same as the control variable. Get your facts straight!!!
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|||thats the same as the control variable which is the one that stays the same somehting thsat doesnt change. Like how it would be if u dnt do anything to the thing(w.e. ur testing) nd The experimental group is the MV and RV . MV= manipulated variable is what u change and RV= responding variable. When u change something (this something would be the mv) sometihng(RV) happens the rv is kind of the result of the mv...
What would be the independent variable, dependent variable, experimental group and control group for this?
Developmental psychologists want to know if exposing children to public television improves their reading skills.|||control is the kids who do not watch tv, experimental would be the ones that do, dependent variable would be the reading skills and independent would be tv, or watching tv
Why is a control group important in an experiment?
I need this answer by today because it's for homework and if I answer this question then I will be done and I can go get something to eat and watch tv. :D|||Its so the other variables will not be messed up and your experiment will be conducted correctly because the control group is the one that stays the same|||The control is left alone so that the other variables may be compared to it. The control is the variable that is usually the "normal" result and that which you are testing against.
So basically you can compare the change in the dependent variable as a result of change in the independent variable.|||because if you do the experiment without controls you wont know if the resuklts are significant
So basically you can compare the change in the dependent variable as a result of change in the independent variable.|||because if you do the experiment without controls you wont know if the resuklts are significant
What are the differences between control group or experient group?
can you give me details|||A group of people are separated into two different groups: the controlled group and the experiment group. The controlled group is the group that receives the normal type of treatment. For example, if two groups were told that they would receive medicine for a headache the controll group would get something like Advil. The emperiment group would get the placebo pill (like a piece of candy). Essentially, the control group receives normal treatment as where the experimental group get the same treatment as well but with some slight alterations to fit the experiment.
Hope this helps.|||Within testing for new things, in the main drug treatments, there are two groups set up.
Group 1 is given the normal treatment, or a placebo, like Kevin said, something of which the results and effects are known, whilst group 2 is given the experimental drug or treatment.
Neither group members are told who has the experimental treatment, or the normal treatment, so that all results are reported back as the true effects the treatment has had.
Hope this helps,
Mike t.
Hope this helps.|||Within testing for new things, in the main drug treatments, there are two groups set up.
Group 1 is given the normal treatment, or a placebo, like Kevin said, something of which the results and effects are known, whilst group 2 is given the experimental drug or treatment.
Neither group members are told who has the experimental treatment, or the normal treatment, so that all results are reported back as the true effects the treatment has had.
Hope this helps,
Mike t.
What is the significance of a control group in a scientific experiment?
i need a short answer of that question, if it is possible. Thank you|||You have a control to use as a basis of comparison. so that you can see what your results mean. If you do an experiment, and get results without a control, you wouldn't know how the results are different from a normal environment.|||It 'controls' for unexpected or unknown variables. If you are testing a toxin, the control would have the same of everything except the toxin. If some in the control die, you have to assume that some in the test would also have died from these uncontrolled causes.
I need to know what is my control group for my project?
I am in 5th grade and am doing a science fair project. my key question is Which will rust a penny faster, coke or mountain dew? In this question what is my control group? Please tell me before friday because that is when the project is deu!!!!!!!!|||I think it would be a third one that you dump in a glass of water. A control group is the group that doesn't get any treatment. For instance if the flowers are growing outside my house in the sun without fertilizer, those would be the control group - no change from normal and it's what you compare the experiment to to measure the results of your experiment to see how much you affected the change. An example:
My flowers grow in my garden with out fertilizer at 1/2 inch a month. The experiment then would be to see whether fertilizer A or B worked better. If the regular group grows 1/2 inch in a month, and the A group now grows 1/4 inch in a month (which means it grew slower than the control group w/ no fertilizer and therefore didn't help growth) and the B fertilizer group grew 1 inch, I have all three measurements but know A wasn't good b/c it was slower than the plants that didn't get any fertilizer at all. The only problem w/ your experiment is that the control group - no exposure group - is hard b/c I think it is going to take a long time to get a penny to rust in any of those things.|||Your controal group is what the faster is being measured against so it would be just a penny.|||A control group is a group that doesn't receive any treatment at all. Therefore, a control group in your case would be a penny that is not soaked in coke or mountain dew.
p/s: if it's possible, could u post the results here. it would be interesting to know...|||The control group in your case would be the "normal" scenario, so just how fast a penny rusts while exposed to air.|||i dunno, i think it should be water. Water and oxygen causes rust, and water has oxygen|||since you are dunking the pennies in a liquid mixture of water + whatever is in mountain dew and coke, I would say the control group would be a penny in distilled water. Make sure it's distilled, because you don't want the chemicals from your tap water to interfere with your experiment. If you have a science lab in your school ask if they have any.
My flowers grow in my garden with out fertilizer at 1/2 inch a month. The experiment then would be to see whether fertilizer A or B worked better. If the regular group grows 1/2 inch in a month, and the A group now grows 1/4 inch in a month (which means it grew slower than the control group w/ no fertilizer and therefore didn't help growth) and the B fertilizer group grew 1 inch, I have all three measurements but know A wasn't good b/c it was slower than the plants that didn't get any fertilizer at all. The only problem w/ your experiment is that the control group - no exposure group - is hard b/c I think it is going to take a long time to get a penny to rust in any of those things.|||Your controal group is what the faster is being measured against so it would be just a penny.|||A control group is a group that doesn't receive any treatment at all. Therefore, a control group in your case would be a penny that is not soaked in coke or mountain dew.
p/s: if it's possible, could u post the results here. it would be interesting to know...|||The control group in your case would be the "normal" scenario, so just how fast a penny rusts while exposed to air.|||i dunno, i think it should be water. Water and oxygen causes rust, and water has oxygen|||since you are dunking the pennies in a liquid mixture of water + whatever is in mountain dew and coke, I would say the control group would be a penny in distilled water. Make sure it's distilled, because you don't want the chemicals from your tap water to interfere with your experiment. If you have a science lab in your school ask if they have any.
What is a independent variable, dependent variable, and control group?
I am 14 years old so try and put it in a kid way please, i think independent variable is like the "experiment" like the main thing. But am still unsure of the rest, make it as easy and simple as possible ty|||Independent Variable: what the experimenter uses or changes to produce results.
Dependent Variable: Measured changed due to independent variable.
Control Group is what stayed the same.
Ex: You are testing the growth of flowers. You believes that flowers with fertilizer grows taller. You water the flowers equally each day. The flowers receives an equal amout of sunlight each day.
Independent V: Fertilizer(It's changing the growth).
Dependent Variable: The Height of the flowers(whats being measured)
Control Group: Water %26amp; Sunlight. (What stays the same)|||In in an experiment you change the independent variable.
Say, you want to see if a tennis ball with a big hole or a small hole floats better.
It's the thing that is never the same.
It's indepent, it's crazy and on it's own. =P
The dependent is the time it takes to sink, it's the part of the experiment that you can't change directly.
and the control would be a tennis ball that you didn't change at all, a normal one.
Dependent Variable: Measured changed due to independent variable.
Control Group is what stayed the same.
Ex: You are testing the growth of flowers. You believes that flowers with fertilizer grows taller. You water the flowers equally each day. The flowers receives an equal amout of sunlight each day.
Independent V: Fertilizer(It's changing the growth).
Dependent Variable: The Height of the flowers(whats being measured)
Control Group: Water %26amp; Sunlight. (What stays the same)|||In in an experiment you change the independent variable.
Say, you want to see if a tennis ball with a big hole or a small hole floats better.
It's the thing that is never the same.
It's indepent, it's crazy and on it's own. =P
The dependent is the time it takes to sink, it's the part of the experiment that you can't change directly.
and the control would be a tennis ball that you didn't change at all, a normal one.
What is the independent variable, dependent variable, and control group?
I need to know what these are. It will be nice if you post and example.|||There are literally hundreds of web sites that already contain clear definitions and examples of these common scientific terms. Please use the WEB SEARCH at the very top of the window or go to google. You'll find reliable resources there...and it's probably where you should have started in the first place. Your science book would also be an ideal place to look...wouldn't it???|||The independent variable is the thing that you are changing. the dependent variable is a result of that change. the control is not changed at all.
What would be the control group is i was to try and find the viscosity of different liquids?
like dropping a marble in a tube and using different liquids to test the viscosity!!!|||one generally uses pure water as a base point. other liquids are typically refrenced as lighter or heavier than water.|||u would now tell me the spellings of college
What is the difference between a control group and a control setup in an expirement?
for a bio report|||Control group: You use this to compare the results of your experiment. The different factors of the experiment stay the same for this, and it doesn't change.
Control set up: You control everything that goes on in the experiment. For example, the amount of bacteria, liquid, etc.
Control set up: You control everything that goes on in the experiment. For example, the amount of bacteria, liquid, etc.
What is the independent, dependent variable, and control group in this experiement?
Homer notices that his shower is covered in a strange green slime. His friend braney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying hald the shower with cocunut juice and the other with water! HELPP PLEASE!!|||dependent variable: spraying coconut juice
because is the variable that YOU control
the independent one is is what the dependent caused..
the control group is the side sprayed with water..
if u had a new medicine and u give it to only have A and not B, A is the experimental group and B the control group
hope this helps|||The independent variable, teh one you manipulate directly,
(usually the item under test), is the fluid sprayed
for cleaning the slime. - Water vs coconut juice.
The dependent variable is the amount of slime removed.
(This should be as unform as possible.
A better experiment might be to use two parts
of the same wall to get 'equal slime' for the test.)
The control group is the half sprayed with water used as a comparison.
What is missing is a calibrated measurement of the difference.
Maybe Homer could call in Ned Flanders to assign 'cleanily eenily' numbers.
because is the variable that YOU control
the independent one is is what the dependent caused..
the control group is the side sprayed with water..
if u had a new medicine and u give it to only have A and not B, A is the experimental group and B the control group
hope this helps|||The independent variable, teh one you manipulate directly,
(usually the item under test), is the fluid sprayed
for cleaning the slime. - Water vs coconut juice.
The dependent variable is the amount of slime removed.
(This should be as unform as possible.
A better experiment might be to use two parts
of the same wall to get 'equal slime' for the test.)
The control group is the half sprayed with water used as a comparison.
What is missing is a calibrated measurement of the difference.
Maybe Homer could call in Ned Flanders to assign 'cleanily eenily' numbers.
Can you direct me to best places to get contributions/supplies for our local animal control group ?
We are a small town, 3000 ,and will soon be able to use the new County Facility 15 mi. away to actually treat and house animals.
But we need all sort of equipment, crates of various size, catch equipment, heavy gloves, in order to catch and transport them to the Facility .
Know a company who might donate a small flat bed trailer for the cause ?|||i don't know of onebutyou should try asking a local store, preferably a pet store. do you have a town nearby you that you can contact its local animal shelter to maybe get ideas? a local vet perhaps? try going to local businesses, tell them what you are doing and ask if they'd like to help.
i wish you luck!!!!!!!
But we need all sort of equipment, crates of various size, catch equipment, heavy gloves, in order to catch and transport them to the Facility .
Know a company who might donate a small flat bed trailer for the cause ?|||i don't know of onebutyou should try asking a local store, preferably a pet store. do you have a town nearby you that you can contact its local animal shelter to maybe get ideas? a local vet perhaps? try going to local businesses, tell them what you are doing and ask if they'd like to help.
i wish you luck!!!!!!!
What is the purpose of a nutrient agar plate that is covered act as a control group? ?
Also, what could be the reason as to why colonies of bacteria would appear on the control plate?|||The control plate acts as an example of what a negative result can look like.
If there is growth on the plate it can be caused by a contamination.
If there is growth on the plate it can be caused by a contamination.
What should I write about for my sociology research experimental control group paper?
Thanks.|||Once upon a time, when I was young, my college prof would chain smoke whenever he taught and pace back and forth across the stage in front of us. This was a behavior mod class, so we decided to test what he was teaching. We decided to deprive him of positive feedback, us paying attention to him, whenever he was NOT standing in front of his podium. When he stood still at podium, we would all look up from our note-taking, rapt attention. When he paced and puffed, we would look down or at something else. It worked in just a few minutes. He began to stand in front of the podium. Of course, he was truly a smart man and he noticed something was up within a half hour and we owned up to manipulating him. He laughed and said he was glad we were learning. Maybe this story will give you an idea for some sort of experiment of your own. Good luck.
What is the control group of this Experiment?
How can we determine which brand of chocolate chip cookie has the most chips per cookie. Basically we had to to break cookies in half and count the chips.|||You wouldn't have a control group in this type of investigation because you are comparing all types of chocolate chip cookies against each other.
If, however, you were comparing various types of chocolate chip cookies to one particular brand of chocolate chip cookie, then that brand of cookie would be your control or baseline for comparison.
If, however, you were comparing various types of chocolate chip cookies to one particular brand of chocolate chip cookie, then that brand of cookie would be your control or baseline for comparison.
What is the control group in this question?
How does color affect the temperature? Im wrapping different colored construction paper around jars and measuring the temp. of the water.|||You would have to have one jar where you didn't wrap any construction paper around it, and that would be the control.
How was the extremist Islamic group that seized control of Afghanistan during the 1990s known?
which islamic group seized control of Afghanistan during the 1990s?|||The Mujahadeen, which later became the Taliban.
They were popular enough to be mentioned in this pop song, by Mike and the Mechanics. (Listen for the line, "I believe in the magic of the mujahadeen..")
http://www.youtube.com/watch?v=wPFcc7Ps3鈥?/a>|||The Taliban.
They were popular enough to be mentioned in this pop song, by Mike and the Mechanics. (Listen for the line, "I believe in the magic of the mujahadeen..")
http://www.youtube.com/watch?v=wPFcc7Ps3鈥?/a>|||The Taliban.
Can someone please give me a definition and example for independent, dependent variables and control group?
I need to find them in a statement and I have no idea what the books definitions are saying and the examples are crap.|||I agree totally with you that the examples given on the web are a load of crap:).
Now let us make it as simple as possible. Say you and a friend are going on a diet (you and fran). You both have to reach a target of say a drop of 10 kilos, and the third friend (mary) is also going on the same diet and has the same weight as you both.
Now let us say that Mary is the control group. i.e. she follows the diet regime to the exact method as given in the diet, she eats only fruits and vegetables and she takes no cokes, but she has a controlled amount of Yogurt no sweets, no snacks in between, she religiously eats only fruits and vegetables and she can eat as much as she wants whenever she wants, as given in the diet. The diet says that if Mary follows this diet she will lose 10 kilos in a month. She has no interest in the gym and is not a sporty type.
You and fran also go on the diet. You are a meat eater and the thought of not eating meat for one month nauseates you. So you decide to become the dependent variable by eating one meal of meat each day while going the routine with the rest of the diet and you will have a controlled amount of yogurt as well, the same amount Mary is allowed. And you agree that you will not go to the gym because Mary does not want you to go to the gym. Mary is trying to prove that her vegie diet as given "like a religion" works!
Fran likes yogurt and she takes the same quantity of yogurt that you and Mary take. Fran occasionally likes the sweets, but she does not tell you about it and she will ocasionally snack on the same quantity of meat that you do, but she eats her sweets so she becomes the independent variable because her result and she may take coke as well, and sometimes pig out on chicken. She becomes the independent variable because she is constantly changing her diet. She also feels super guilty so she throws in an occasional visit to the gym.
At the end of the month, your findings would prove whether the diet shoudl be followed religiously the way Mary did it, or whether it can be changed slightly, the way you did it, or whether your friend Fran has come out the winner because she also threw in a session at the gym. You all would thus prove that you could vary the diet and still lose 10 kilos by other measures which would make the diet certainly more interesting to the average user.
Now the scientific method of calculating this would be the question on whether taking Calcium would increase your age by about 5 years.
Three groups of people are used
1 group is given Calciumin varying quantities from say 10 mg to 50 mg daily. (independent variable)
the second group is not given calcium and given a medicine that they think is calcium but could be chalk but it is 10mg to 50 mg daily.(dependent variable)
The third group is the control group who given a certain dosage of calcium would have to prove that there is a significant increase in their life span say 10 mg daily.
The scientists would then find out after a period of 5 years, whether some of their patients in the first group have dropped dead which proves that even if you give them 10mg to 50mg a day, they die in any case.
The second group may also drop dead or they could live longer than the 1st and 3rd groups because they feel that the calcium has given them longevity and they were told that this was a test to increase their longevity so they believe and that generates its own Karma.
The control group is the most rigid and inflexible and will be monitored so that they cannot do anything that is outside what is required for the scientists research but they could also die for other reasons while undergoing the test for calcium.
So much for research:).. You can have several controls to get the best results by giving 6 of your friends the same diet and you would have each of them change only one item in the diet to include the person's likes :-
John takes chicken but follows the rest of the diet diligently
Jennifer takes Sugared drinks and follows ....
Pauline takes Coke
Patricia eats cake
All these must be measured quantities and cannot be left to the whim of the eater:)..|||An independent variable is something that you control. The dependent variable is the effect of your experiment. The control group is a group which you observe, but don't interfere. You compare it to the group to which you interceded.
For example, I want to know whether adding fertilizer will effect the growth rate of flowers. I add 1 tablespoon of fertilizer to a 5 flower pots once a month. Let's call this the experimental group. The amount of fertilizer I add is the independent variable, because I control how much fertilizer I add.
I measure the growth of the experimental flowers. The amount of growth is the dependent variable, because it is the effect of the amount of fertilizer I add.
I have a second group of 5 flowers. It gets the same amount of sun and water as my experimental flowers, but I don't add any fertilizer to these flowers. These flowers are my control group. I measure how much this second group of flower grows and compare it to the experimental group.
Now let us make it as simple as possible. Say you and a friend are going on a diet (you and fran). You both have to reach a target of say a drop of 10 kilos, and the third friend (mary) is also going on the same diet and has the same weight as you both.
Now let us say that Mary is the control group. i.e. she follows the diet regime to the exact method as given in the diet, she eats only fruits and vegetables and she takes no cokes, but she has a controlled amount of Yogurt no sweets, no snacks in between, she religiously eats only fruits and vegetables and she can eat as much as she wants whenever she wants, as given in the diet. The diet says that if Mary follows this diet she will lose 10 kilos in a month. She has no interest in the gym and is not a sporty type.
You and fran also go on the diet. You are a meat eater and the thought of not eating meat for one month nauseates you. So you decide to become the dependent variable by eating one meal of meat each day while going the routine with the rest of the diet and you will have a controlled amount of yogurt as well, the same amount Mary is allowed. And you agree that you will not go to the gym because Mary does not want you to go to the gym. Mary is trying to prove that her vegie diet as given "like a religion" works!
Fran likes yogurt and she takes the same quantity of yogurt that you and Mary take. Fran occasionally likes the sweets, but she does not tell you about it and she will ocasionally snack on the same quantity of meat that you do, but she eats her sweets so she becomes the independent variable because her result and she may take coke as well, and sometimes pig out on chicken. She becomes the independent variable because she is constantly changing her diet. She also feels super guilty so she throws in an occasional visit to the gym.
At the end of the month, your findings would prove whether the diet shoudl be followed religiously the way Mary did it, or whether it can be changed slightly, the way you did it, or whether your friend Fran has come out the winner because she also threw in a session at the gym. You all would thus prove that you could vary the diet and still lose 10 kilos by other measures which would make the diet certainly more interesting to the average user.
Now the scientific method of calculating this would be the question on whether taking Calcium would increase your age by about 5 years.
Three groups of people are used
1 group is given Calciumin varying quantities from say 10 mg to 50 mg daily. (independent variable)
the second group is not given calcium and given a medicine that they think is calcium but could be chalk but it is 10mg to 50 mg daily.(dependent variable)
The third group is the control group who given a certain dosage of calcium would have to prove that there is a significant increase in their life span say 10 mg daily.
The scientists would then find out after a period of 5 years, whether some of their patients in the first group have dropped dead which proves that even if you give them 10mg to 50mg a day, they die in any case.
The second group may also drop dead or they could live longer than the 1st and 3rd groups because they feel that the calcium has given them longevity and they were told that this was a test to increase their longevity so they believe and that generates its own Karma.
The control group is the most rigid and inflexible and will be monitored so that they cannot do anything that is outside what is required for the scientists research but they could also die for other reasons while undergoing the test for calcium.
So much for research:).. You can have several controls to get the best results by giving 6 of your friends the same diet and you would have each of them change only one item in the diet to include the person's likes :-
John takes chicken but follows the rest of the diet diligently
Jennifer takes Sugared drinks and follows ....
Pauline takes Coke
Patricia eats cake
All these must be measured quantities and cannot be left to the whim of the eater:)..|||An independent variable is something that you control. The dependent variable is the effect of your experiment. The control group is a group which you observe, but don't interfere. You compare it to the group to which you interceded.
For example, I want to know whether adding fertilizer will effect the growth rate of flowers. I add 1 tablespoon of fertilizer to a 5 flower pots once a month. Let's call this the experimental group. The amount of fertilizer I add is the independent variable, because I control how much fertilizer I add.
I measure the growth of the experimental flowers. The amount of growth is the dependent variable, because it is the effect of the amount of fertilizer I add.
I have a second group of 5 flowers. It gets the same amount of sun and water as my experimental flowers, but I don't add any fertilizer to these flowers. These flowers are my control group. I measure how much this second group of flower grows and compare it to the experimental group.
I don't get how Control and Control Group can be different?
A control group gets a placebo
A control is not exposed to experimental treatment
HUH?|||the placebo is not the experimental treatment. For example, the test group will get the drug and the control group will get a sugar pill. The sugar pill is a placebo, so the people in the control group are not exposed to the experimental treatment (the drug)
A control is not exposed to experimental treatment
HUH?|||the placebo is not the experimental treatment. For example, the test group will get the drug and the control group will get a sugar pill. The sugar pill is a placebo, so the people in the control group are not exposed to the experimental treatment (the drug)
What would be the control group in this experiment?
so we did this experiment in my science class and i dont know what the control group would be. we took three balls, a bouncy ball, golf ball, and a ping-pong ball. we had a meter stick and we dropped each ball three times from 10cm, 20cm, 30cm, all the way up to 100cm. and any idea what it would be? thanks|||Your science teacher appears to have neglected to give you some very important information. That's the definition of an experiment and of an observation.
In an experiment, you, as a researcher make some type of change to part of something which you are studying, while leaving the other part in it's natural/normal state (the control group). This could be something such as giving one group of plants a fertilizer, and not the other, or giving a group of people a drug while others get a placebo.
In an observation, you record data about your subject, but you don't make any changes (or change all groups equally, as in lifting the balls from their resting state to a specific height so they can fall and bounce). Since there are no changes made, there is no reason to have a "control". This is what you've done by measuring how high a ball would bounce when dropped from different heights - you didn't alter any of the balls, you just used them as they were. The only "change" that was made was the height from which you dropped the balls, but this "change" was made for all the balls equally.
Some other types of observations might be a comparison of attention spans by age of an individual, or what types of vegetation grow in different soil types. No "changes" are made by the researcher to to any of the subjects in either case, just the necessary information (attention span, plant identifications) collected and classified by age, or soil type.|||There is no control in this experiment - you are simply comparing the "bounciness" of three different types of ball.
..
In an experiment, you, as a researcher make some type of change to part of something which you are studying, while leaving the other part in it's natural/normal state (the control group). This could be something such as giving one group of plants a fertilizer, and not the other, or giving a group of people a drug while others get a placebo.
In an observation, you record data about your subject, but you don't make any changes (or change all groups equally, as in lifting the balls from their resting state to a specific height so they can fall and bounce). Since there are no changes made, there is no reason to have a "control". This is what you've done by measuring how high a ball would bounce when dropped from different heights - you didn't alter any of the balls, you just used them as they were. The only "change" that was made was the height from which you dropped the balls, but this "change" was made for all the balls equally.
Some other types of observations might be a comparison of attention spans by age of an individual, or what types of vegetation grow in different soil types. No "changes" are made by the researcher to to any of the subjects in either case, just the necessary information (attention span, plant identifications) collected and classified by age, or soil type.|||There is no control in this experiment - you are simply comparing the "bounciness" of three different types of ball.
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How many variables are changed between a control group and an experimental group?
please answer i need it for a study guide due tom. in Biology T_T|||Just one at a time so you know what had the effect on the experiment
What are the control group, test group, indep and dep variables for experiment on basketball shooting?
the project will determine if a ball's starting position for shooting a basketball affects a players shooting percentage.
shooting positions will be from each hand from the chest, chin, over head. I will keep track of how many shots each player made from each hand position.|||You will have each player shoot from 6 positions, say 10 shots each. The players that do this are the test group = you are testing them.
For a control group, I would use the same people. Have each person shoot 60 shots in their normal shooting motion. Record the number of shots made for each set of 10. This will tell you how well the person usually shoots.
I think I would have them shoot 10 from one of the test positions, then 10 as they normally would, then a second set from a different test position, then 10 to control, and so on. That way you will be able to see if they just get better as they shoot (last 10 control and last test position are much better than the first control and test shots), or if a particular position seems to be best (everyone shoot best from right hand at the chin while all the control groups of shots were about the same).
I think I would have them all do the various test positions in the same order, but maybe that isn't so important. I would also note whether people are right or left handed.
Hope that makes sense!
As for dependent and independent variable: if I understand correctly, the independent variable is the shooting position = you are deciding on it, and there is no other influence. I think then that the dependent variable would be the number of shots that go in.
Good luck!
shooting positions will be from each hand from the chest, chin, over head. I will keep track of how many shots each player made from each hand position.|||You will have each player shoot from 6 positions, say 10 shots each. The players that do this are the test group = you are testing them.
For a control group, I would use the same people. Have each person shoot 60 shots in their normal shooting motion. Record the number of shots made for each set of 10. This will tell you how well the person usually shoots.
I think I would have them shoot 10 from one of the test positions, then 10 as they normally would, then a second set from a different test position, then 10 to control, and so on. That way you will be able to see if they just get better as they shoot (last 10 control and last test position are much better than the first control and test shots), or if a particular position seems to be best (everyone shoot best from right hand at the chin while all the control groups of shots were about the same).
I think I would have them all do the various test positions in the same order, but maybe that isn't so important. I would also note whether people are right or left handed.
Hope that makes sense!
As for dependent and independent variable: if I understand correctly, the independent variable is the shooting position = you are deciding on it, and there is no other influence. I think then that the dependent variable would be the number of shots that go in.
Good luck!
If subjects are randomized to 1 of 4 groups, none of which is a control group, is it still a true experiment?
I'm trying to distinguish between a true experiment and a quasi-experiment and need to know if the presence of a control groups is a necessity for a true experiment (rather than just typical).|||Random assignment into groups acts as a way to control variables. You only use a control group when interaction with the experimenter (giving attention) or drug research .....it depends upon what you are doing. And yes, random assignment is very much a TRUE experiment.. More the norm than having a control group. (psych prof)
A control group is A) a set of individuals that receive a certain treatment B) the standard treatment against?
A control group is
A) a set of individuals that receive a certain treatment
B) the standard treatment against which an experimental group is compared
C) the experiment that gives conclusive results
D) not usually necessary when conducting experiments|||B) the standard treatment against which an experimental group is compared|||The correct answer is B.
A) a set of individuals that receive a certain treatment
B) the standard treatment against which an experimental group is compared
C) the experiment that gives conclusive results
D) not usually necessary when conducting experiments|||B) the standard treatment against which an experimental group is compared|||The correct answer is B.
Thursday, December 15, 2011
What is the primary reason for including a control group within the design of an experiment?
A.) To ensure that the results obtained are due to a difference in only one variable.
b.) To ensure that the experimenter can perform a more complete statistical analysis
C. To demonstrate in what way the experiment was performed incorrectly.
D. To accumulate additional facts that can be reported to other scientists
E. To test the effect of more than one variable|||A.) To ensure that the results obtained are due to a difference in only one variable.
You want a control to compare a result to. If you have multiple variables within your experiment, then you do not know which variable is causing the result you got.
So a control just allows you to make sure that your experiment is testing one variable only.
good luck.|||The best answer here is A
b.) To ensure that the experimenter can perform a more complete statistical analysis
C. To demonstrate in what way the experiment was performed incorrectly.
D. To accumulate additional facts that can be reported to other scientists
E. To test the effect of more than one variable|||A.) To ensure that the results obtained are due to a difference in only one variable.
You want a control to compare a result to. If you have multiple variables within your experiment, then you do not know which variable is causing the result you got.
So a control just allows you to make sure that your experiment is testing one variable only.
good luck.|||The best answer here is A
What is the independent variable dependent variable and control group?
I am measuring sky glow at the same location on different days i use a camera to measure it and i angle the camera at the same angle|||independent variable: Different days. This is what the researcher is changing on purpose
dependent variable: sky glow (distance measured by the camera)
constants: angle of the camera, same time of day, same location, same camera
control group: I'm not sure since the definition is a group not using the independent variable, which is different days. You have to do it on a day, you can't change that aspect, so I'm not sure. I guess you can use day 1 as your control.|||I think the dependent variable would be the sky glow, since what presumably will change, the independent is the angle of the camera, since that is what doesn't change, and controlled variables would be weather that night, the type of camera you are using, and which area of the sky you will be viewing.
dependent variable: sky glow (distance measured by the camera)
constants: angle of the camera, same time of day, same location, same camera
control group: I'm not sure since the definition is a group not using the independent variable, which is different days. You have to do it on a day, you can't change that aspect, so I'm not sure. I guess you can use day 1 as your control.|||I think the dependent variable would be the sky glow, since what presumably will change, the independent is the angle of the camera, since that is what doesn't change, and controlled variables would be weather that night, the type of camera you are using, and which area of the sky you will be viewing.
What do I use for the CONTROL GROUP? in experiment?
I am testing what works best with growing a seed...sprite, ammonia, water, salt water. What do I use for the control group? No liquid at all?|||The accepted method to grow a seed is water, so that should probably be your control group. If that is part of your given experiement, however, then why not simply use nothing? The experiment then would be to see what works best with growing a seed as compared to no moisture at all except for the moisture in the air.
What are some experiments for a experimental control group?
What are some experiments I can make up?|||Hi :0,
In traditional lab experimental design we pick a topic of interest that may answer a question or test an hypothesis. While there are numerous variations, a simple example would be to select a sample from a population of interest... sort members of the sample into a treatment group and a control group using a random technique such as a coin toss... then expose the treatment group to the experimental variable while avoiding such exposure to the control group. We'd then measure the effect we're interested in for each group.. experimental and control. Any difference beyond chance would be associated with an experimental effect.
Example: Walk up behind someone [experimental group subject] and clap your hands [independent variable]. Watch to see if they exhibit a startle reflex [dependent variable]. Do this for each member of your experimental group. Record how often you get a startle reflex. Then walk up behind someone [control group subject] but don't clap your hands. Record how often you get a startle reflex. Do this for each member of the control group. Compare the mean score [average] number of startle reflexes between the experimental group and the control group. See if the clap of hands is associated [correlated] with the startle reflex. Notice that the purpose of the control group is to have something to compare to the experimental [treatment] group. Regards.
In traditional lab experimental design we pick a topic of interest that may answer a question or test an hypothesis. While there are numerous variations, a simple example would be to select a sample from a population of interest... sort members of the sample into a treatment group and a control group using a random technique such as a coin toss... then expose the treatment group to the experimental variable while avoiding such exposure to the control group. We'd then measure the effect we're interested in for each group.. experimental and control. Any difference beyond chance would be associated with an experimental effect.
Example: Walk up behind someone [experimental group subject] and clap your hands [independent variable]. Watch to see if they exhibit a startle reflex [dependent variable]. Do this for each member of your experimental group. Record how often you get a startle reflex. Then walk up behind someone [control group subject] but don't clap your hands. Record how often you get a startle reflex. Do this for each member of the control group. Compare the mean score [average] number of startle reflexes between the experimental group and the control group. See if the clap of hands is associated [correlated] with the startle reflex. Notice that the purpose of the control group is to have something to compare to the experimental [treatment] group. Regards.
What are the dependant and independant variables, control group and constants?
In biuret, starch, lipid and benedicts test. How can independant variable be manipulated?|||The independant variables are the variables that you control and the dependant variable are the variable that take place BECAUSE of the independant variables.
The control group is a neutral group so you have a "norm" to base your experiement on. For example if you're testing a pill that contains hormones then you give one group the hormone pill and another group a placebo (sugar pill) and you don't tell the groups which one they're getting. That way you can see whether it's psychological or not.
The constants are pretty much what stays constant.
The control group is a neutral group so you have a "norm" to base your experiement on. For example if you're testing a pill that contains hormones then you give one group the hormone pill and another group a placebo (sugar pill) and you don't tell the groups which one they're getting. That way you can see whether it's psychological or not.
The constants are pretty much what stays constant.
What is the difference between a controlled variable and a control group?
Thanks so so much.|||In an experiment, the control group is your standard group.
The control variable (controlled variable) is the item or items you add to the control group to make it slightly different.
For example:
You want to see how fast a piece of paper falls, depending on it's shape. Your control group would be dropping a piece of paper flat at 6 meters from the group. Your control variable would be balling up that piece of paper. Now you would repeat the experiment with the control variable - and again drop the piece of paper from 6 meters.
The difference in time it takes for the paper to drop would tell you how much effect the control variable had on the experiement.|||controlled variable is the tested group and controlled group is not tested but used in the experiment.
The control variable (controlled variable) is the item or items you add to the control group to make it slightly different.
For example:
You want to see how fast a piece of paper falls, depending on it's shape. Your control group would be dropping a piece of paper flat at 6 meters from the group. Your control variable would be balling up that piece of paper. Now you would repeat the experiment with the control variable - and again drop the piece of paper from 6 meters.
The difference in time it takes for the paper to drop would tell you how much effect the control variable had on the experiement.|||controlled variable is the tested group and controlled group is not tested but used in the experiment.
Control group, experimental group, dependant and independant variables.?
I am very confused by the definition of these. most confusing is are control groups the same as dependant variables? here is the question in my book:
the difference between the experimental and control groups should be that the:
A- control group receives the independent variable and the experimental group does not.
B- the experimental group receives the dependent variable and the control group does not.
C- nothing, these are synonyms that refer to the same group
D- control group receives the dependent variable and the experimental group does not; the experimental group receives the independent variable and the control group does not.
E- none of the above
whats the right answer? can someone please explain how these are all linked because I don't understand..
thank you|||Control group - a group of "things" that you leave constant, in order to compare your experimental results to them.
Experimental group - another group of "things" that you might change to see the effect your change has.
Independent variable - the measured things YOU change.
Dependent variable - the thing that changes in response to your change to the dependent variable.
This is a ridiculous example, but maybe it will illustrate it for you:
Say you have a normal block of wood, like a short length of pine 2x4. You want to investigate the effect of painting that wood on the buoyancy of it. So what you do is you take a few pieces of 2x4, the same size, and you leave the first one unpainted. You haven't changed anything about it so it remains your control. Then you paint one side of the next one. And two sides of another one, etc. until you have all six sides painted. Then you drop them all in the water and measure how much the top of the wood sticks out of the water.
Control group - unpainted wood
Experimental group - painted wood blocks
Independent variable - amount of paint
Dependent variable - amount the wood sinks.
You could then graph sides painted vs. amount the wood sinks, with the sides painted on the x/horizontal axis and amount of sink on the y/vertical axis.
I hope that makes sense. Hopefully it answers your question.
the difference between the experimental and control groups should be that the:
A- control group receives the independent variable and the experimental group does not.
B- the experimental group receives the dependent variable and the control group does not.
C- nothing, these are synonyms that refer to the same group
D- control group receives the dependent variable and the experimental group does not; the experimental group receives the independent variable and the control group does not.
E- none of the above
whats the right answer? can someone please explain how these are all linked because I don't understand..
thank you|||Control group - a group of "things" that you leave constant, in order to compare your experimental results to them.
Experimental group - another group of "things" that you might change to see the effect your change has.
Independent variable - the measured things YOU change.
Dependent variable - the thing that changes in response to your change to the dependent variable.
This is a ridiculous example, but maybe it will illustrate it for you:
Say you have a normal block of wood, like a short length of pine 2x4. You want to investigate the effect of painting that wood on the buoyancy of it. So what you do is you take a few pieces of 2x4, the same size, and you leave the first one unpainted. You haven't changed anything about it so it remains your control. Then you paint one side of the next one. And two sides of another one, etc. until you have all six sides painted. Then you drop them all in the water and measure how much the top of the wood sticks out of the water.
Control group - unpainted wood
Experimental group - painted wood blocks
Independent variable - amount of paint
Dependent variable - amount the wood sinks.
You could then graph sides painted vs. amount the wood sinks, with the sides painted on the x/horizontal axis and amount of sink on the y/vertical axis.
I hope that makes sense. Hopefully it answers your question.
How to control a group in GTA San Andreas?
I have the power to control a 5 member group now. but don't know how to do it. Please help...|||I think you aim at them with fist and press the left or right arrow. if it doesnt work then im sorry :(|||Thanx Cober336..... It helpd a bit as wat I have to do is to aim at them %26amp; press group control forward key (G)
|||Sorry but i cant play san andreas in psp i play gta and vice city|||you have to go up to a total of 5 players but it can be even 1 and press up on the direction arrows, i havent played in a while but that should do it|||Aim at them with a gun
But don't shoot!
Report Abuse
|||Sorry but i cant play san andreas in psp i play gta and vice city|||you have to go up to a total of 5 players but it can be even 1 and press up on the direction arrows, i havent played in a while but that should do it|||Aim at them with a gun
But don't shoot!
What is the difference between an experimental and control group?
A control group is the "normal" group. Nothing will be experiemented on them. The result from the control group should be what the typical result is.
The experimental group is the group that's going to be tested if a product works or not. They are somehow going to be manipulated.
The experimental group is the group that's going to be tested if a product works or not. They are somehow going to be manipulated.
What is the difference between a control group and controlled variables?
the controlled variables are the variables that you are controlling, (ex) the amount of water fed to plants in an experiment testing the effect of different amounts of fertilizer on those plants, and a control group would be the group of plants that you are adding not fertilizer to, The group in which you are not manipulating the independent variable.|||The control group is the set of subjects for which nothing changes. You'll be measure changes in the test group against them.
The controlled variables are the things that you are changing between the control group and the test group.
The controlled variables are the things that you are changing between the control group and the test group.
How is a "controlled experiment" different from a "control" group, and how are they related?
This is my biology homework question.
Help meeee.
Please put your answers in complete sentence(s), and do not give me links to go look at.
Thank you!|||A controlled experiment occurs in a lab/research setting. As opposed to a 'naturalistic observation', which is research done in the field by observing natural behavior/occurences. A control group acts as the checks and balances to the actual experiment. You will have the 'test' group that is given a test variable. You measure your results. The 'control' group is not given the actual test variable and those results are compared against the test groups'.
Help meeee.
Please put your answers in complete sentence(s), and do not give me links to go look at.
Thank you!|||A controlled experiment occurs in a lab/research setting. As opposed to a 'naturalistic observation', which is research done in the field by observing natural behavior/occurences. A control group acts as the checks and balances to the actual experiment. You will have the 'test' group that is given a test variable. You measure your results. The 'control' group is not given the actual test variable and those results are compared against the test groups'.
What is the control group in this problem statement?
"what is the effect on stabbing holes in a fresh banana have on the "life span" of the banana before it completely rots?|||The control group is simply the group that isn't exposed to the independent variable. In this case, it's the group of bananas that aren't being stabbed.|||for that you should see
http://kamrankhan4u.blogspot.com
i hope that resolve your problem. i have also experienced this web on answers.yahoo.com|||the fresh banana?
http://kamrankhan4u.blogspot.com
i hope that resolve your problem. i have also experienced this web on answers.yahoo.com|||the fresh banana?
What is the control group in this experiment?
A scientist believes that bright red chest coloring on male birds makes them more attractive to females. In an experiment, she uses six birds, all with the same color chest. She bleaches the feathers of two of the birds, dyes the chests of two of the birds bright red, and leaves the chests of two of the birds alone. When females are exposed to these males, she believes that more females will chose to mate with the red-dyed males.|||Check out:
http://en.wikipedia.org/wiki/Scientific_鈥?/a>
I would say that the control group is the two birds left alone, but I think one could make the argument that the bleached ones are included too. A control is supposed to be a sample that only differs from the test group in the characteristic being studied. The purpose of the bleached birds is not clear from the question since the researcher does not give any hypothesis about them.
http://en.wikipedia.org/wiki/Scientific_鈥?/a>
I would say that the control group is the two birds left alone, but I think one could make the argument that the bleached ones are included too. A control is supposed to be a sample that only differs from the test group in the characteristic being studied. The purpose of the bleached birds is not clear from the question since the researcher does not give any hypothesis about them.
What are the independent Variable, Dependent variable, experimental group, and control group?
1.A group of college students were fiven a short course in speed- reading . the instructor was curious whether a monetary incentive would influence performance on a reading test taken at the end of the course. half the students were offered 5$ for obtaining a certain level of performance on the test, the other half were not given money .|||Independent Variable = money ($5)
Dependent Variable = reading speed/level
Experimental Group = the students who were offered $5
Control Group = the students who were not given money
Dependent Variable = reading speed/level
Experimental Group = the students who were offered $5
Control Group = the students who were not given money
Is their a control group in this science experiment?
He asked a group of male cyclists to ride intensely until their legs were aching and virtually all of their stored muscle fuel had been depleted. The cyclists then consumed bars and drinks that contained either mostly carbohydrates or both carbohydrates and protein. Then, over the next few days, they completed two sessions of hard intervals. One took place the following morning; the next, two days later.|||No, if there was a group that didn't consume anything and rode again, then there would be a control group.
What is the point of a control group in an experiment?
I dont understand why we do one in an experiment. Whats the purpose of having one? What benefits does it give ?|||Without a control an experiment cannot be considered valid. The control shows what happens under normal circumstances, and these results allow you to compare the results from experiments with what would happen normally. Having a control may seem pointless when observing physical properties (for example a control which is just a cup of water on the bench in which case it's obvious that there will be no change), but when you're dealing with numbers you need the results of the control to put your experimental data into perspective and when you perform experiments you need to have a control to determine how much of an impact environmental conditions had on your results.|||I will try to break this down for you. This can be kind of a confusing things to understand, so I know where you are coming from with your question.
I am going to give you an example of how this whole thing works.
Lets say that I claim to have this wonder pill that cures all depression. People are probably not going to believe me without evidence.
I am going to have to prove myself by doing an experiment. I am going to collect a population of people who are depressed.
I am going to call one of my groups and "experimental group". This group will get my pill that cures depression.
I am going to also have a "control group" who will receive a pill that is fake and will NOT cure depression.
I will NOT know who receives my real pill and the people that I am doing the experiment on will also NOT know what pill they are receiving.
We do this so that there is no biased in the experiment. We don't want the people to be aware of what pill there taking because we want to see if my pills made a difference or not.
If the group that takes the pill starts feeling better after taking my pill than we know that my pill works.
If the group that takes the fake pill still feels like crap, than it will prove my point.
If you give 25 real pills out and 25 fake pills out than you need to see how many of them felt better by taking my pills.
A control group is important because they help to prove my point. I want to prove to people that my pill really works. I want to show people that I gave fake and real pills out. If the 25 people that I gave the fake pills to still feel like crap than I prove that my pills work.
I don't want someone to stand their and tell me that the depressed people only started feeling better because they knew that they were going to get better by taking my pills.
If no one knows what pill that they are taking than the people prove my theory for me.
I hope this didn't confuse you more!
hope this helped,
Cordelia
There is also something called the placebo affect. Sometimes the people who take the fake pill, actually start to feel better. This is more psychological than anything else.|||Its just like a neutral..Its used to compare the results we get from samples with the neutral one..so that the effect of the experiment or result can be accurately calculated..|||It gives you something to compare your results with. it can determine if the scientific investigation was a success or failure.
I am going to give you an example of how this whole thing works.
Lets say that I claim to have this wonder pill that cures all depression. People are probably not going to believe me without evidence.
I am going to have to prove myself by doing an experiment. I am going to collect a population of people who are depressed.
I am going to call one of my groups and "experimental group". This group will get my pill that cures depression.
I am going to also have a "control group" who will receive a pill that is fake and will NOT cure depression.
I will NOT know who receives my real pill and the people that I am doing the experiment on will also NOT know what pill they are receiving.
We do this so that there is no biased in the experiment. We don't want the people to be aware of what pill there taking because we want to see if my pills made a difference or not.
If the group that takes the pill starts feeling better after taking my pill than we know that my pill works.
If the group that takes the fake pill still feels like crap, than it will prove my point.
If you give 25 real pills out and 25 fake pills out than you need to see how many of them felt better by taking my pills.
A control group is important because they help to prove my point. I want to prove to people that my pill really works. I want to show people that I gave fake and real pills out. If the 25 people that I gave the fake pills to still feel like crap than I prove that my pills work.
I don't want someone to stand their and tell me that the depressed people only started feeling better because they knew that they were going to get better by taking my pills.
If no one knows what pill that they are taking than the people prove my theory for me.
I hope this didn't confuse you more!
hope this helped,
Cordelia
There is also something called the placebo affect. Sometimes the people who take the fake pill, actually start to feel better. This is more psychological than anything else.|||Its just like a neutral..Its used to compare the results we get from samples with the neutral one..so that the effect of the experiment or result can be accurately calculated..|||It gives you something to compare your results with. it can determine if the scientific investigation was a success or failure.
Can someone clearly explain to me what a control group is and what a constant is in science/biology?
Can someone clearly explain to me what a control group is and what a constant is? make it really easy to understand|||Imagine you want to find out if GrowGrowGrow fertilizer is any good. You plan to test it on radishes and carrots. You'll probably plant ten batches of each vegetable, with various amounts of the fertilizer. One batch won't get any of the fertilizer. That's the "control" group.
You'll make every effort to ensure that all ten batches, including the control group, get exactly the same treatment except for the amount of fertilizer. Your experiment will hold the sunlight, the water, the temperature, the brand of seed, the type of soil, and so on, to be the same for all ten batches. You'll be varying just one thing, and keeping the other parameters constant. Except that they'll probably vary over time, but will vary the same way for all ten batches.
Does that make sense? I hope that it matches the definitions your textbook and your teacher are using.
The idea is that you have to change just one thing at a time, so that you can make sense out of your results. Doing the work that way can make the work tedious, but can give you good results. Sometimes scientists have to vary more than one parameter at a time, and the mathematics to understand their results can get very complicated. See the reference for multivariate analysis.
You'll make every effort to ensure that all ten batches, including the control group, get exactly the same treatment except for the amount of fertilizer. Your experiment will hold the sunlight, the water, the temperature, the brand of seed, the type of soil, and so on, to be the same for all ten batches. You'll be varying just one thing, and keeping the other parameters constant. Except that they'll probably vary over time, but will vary the same way for all ten batches.
Does that make sense? I hope that it matches the definitions your textbook and your teacher are using.
The idea is that you have to change just one thing at a time, so that you can make sense out of your results. Doing the work that way can make the work tedious, but can give you good results. Sometimes scientists have to vary more than one parameter at a time, and the mathematics to understand their results can get very complicated. See the reference for multivariate analysis.
Control group and variable ? for the "penny lab" (how many drops of water can fit on a penny ?)?
Hi, my teacher made us do the "Penny Lab"
and we had to write an inquiring question:
How many drops of H2O will fit on a penny (tail side)(one-inch height) and other things for labs.
and anyways our homework she says is:
"Establish your Control with materials available to you at home. Do 10 trials for control. Then change one variable and do 10 trials again. To add to your already completed lab write up add the following things and bring it to class on Monday:
- 5 more research questions pertaining to your variable.( So you should have total of 15 questions and answers)
-two hypotheses, one for control and one for new variable
-Rewrite your Experiment under 3 titles: Materials
Procedure, Labelled diagram"
i don't understand what the variable and control group is, i am planning to change the 'dropper' to a water bottle with a hole in it though. so is that the variable that is changed? i'm confused as to what 5 questions too. So if anyone can help, thanks :)|||Your constant would be the one thing that is constant in all the repetitions of the experiment, ie, you use the same penny for all the repetitions, use only distilled water for all repetitions, same dropper, etc. Your variable could be using differnt pennies for the repetitions, different contaminants in precise concentrations for the repetitions, temperature variations, etc. Your control GROUP would be the first group of repetitions where you used the distilled H2O at a constant temperature on the same penny, from the same dropper, recorded each result, then averaged the results for that set. This is introducing the concept of scientific research, where you determine the effects of a variable on a system.|||Did you have Mrs. Sabherwal for Biology???
|||they are not always exact because my freind says 43 and i say 14-16 drops and we both did we both did expiriments on the subject!
hope i helped you in some way!
-Mia Elledge %26amp; Porshay August|||Independent Variable is the thing you change in the experiment ex: H2O to vinager or other liquid substance. Dependent variable is what changes because of you changing something.
Control could be the temperature of the water or other liquid it should be a constant. What you use to drop the water on the penny, the angle in which you hold the dropper, or the heighth you drop from etc... My 8th grade students just did this lab in class last week.
and we had to write an inquiring question:
How many drops of H2O will fit on a penny (tail side)(one-inch height) and other things for labs.
and anyways our homework she says is:
"Establish your Control with materials available to you at home. Do 10 trials for control. Then change one variable and do 10 trials again. To add to your already completed lab write up add the following things and bring it to class on Monday:
- 5 more research questions pertaining to your variable.( So you should have total of 15 questions and answers)
-two hypotheses, one for control and one for new variable
-Rewrite your Experiment under 3 titles: Materials
Procedure, Labelled diagram"
i don't understand what the variable and control group is, i am planning to change the 'dropper' to a water bottle with a hole in it though. so is that the variable that is changed? i'm confused as to what 5 questions too. So if anyone can help, thanks :)|||Your constant would be the one thing that is constant in all the repetitions of the experiment, ie, you use the same penny for all the repetitions, use only distilled water for all repetitions, same dropper, etc. Your variable could be using differnt pennies for the repetitions, different contaminants in precise concentrations for the repetitions, temperature variations, etc. Your control GROUP would be the first group of repetitions where you used the distilled H2O at a constant temperature on the same penny, from the same dropper, recorded each result, then averaged the results for that set. This is introducing the concept of scientific research, where you determine the effects of a variable on a system.|||Did you have Mrs. Sabherwal for Biology???
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|||they are not always exact because my freind says 43 and i say 14-16 drops and we both did we both did expiriments on the subject!
hope i helped you in some way!
-Mia Elledge %26amp; Porshay August|||Independent Variable is the thing you change in the experiment ex: H2O to vinager or other liquid substance. Dependent variable is what changes because of you changing something.
Control could be the temperature of the water or other liquid it should be a constant. What you use to drop the water on the penny, the angle in which you hold the dropper, or the heighth you drop from etc... My 8th grade students just did this lab in class last week.
What is the purpose of the control group in a controlled experiment?
That is my question in biology homework. Help me out.|||To have a group of stable and unchanged variables to compare and analyze results to.|||You need to have a control group so you can compare the results of between the variables and the control group. For example, you are experimenting whether feeding more food to a fish would increase its growth rate. Your variable would be the extra food. And your control would be normal amount of food. Thus, you can definitely say that only food was the factor in the results.|||To allow the person doing the experiment to compare the results they get with normal results
What would the control group in an experiment to see what liquid cleans pennies best?
Also, info on how to perform the experiment would be very useful!! :)|||You state what liquid you think may work the best based upon some research.
You come up with what chemicals you wish to test. You will want to test multiple coins in the same solution but in different containers so 1 will not effect another.
Your controls would be,
Same amt of liquid in each container
same exact container to hold the liquid
same type coin with roughly the same amount of tarnish/dirtiness
same condition each container must sit in (i.e. keep them all together in 1 spot in the same temp, same amt of light, etc.)
same length of time in the liquid
Controls are the things to keep the same for everything you are doing so you can rule out any differences, like say you use 2 different type of containers, you wouldn't know if it was the chemical or the container that made the difference, so keep as much the same as possible, you control this aspect.|||For the control, I would soak the pennies in water. All the pennies need to be tarnished about the same amount. I've heard that vinegar cleans pennies. Alot of condiments have vinegar in them- ketchup, Texas Pete, salsa. I would use some of those and then maybe do some commercial cleaners, too -like windex, dish soap, fantastic. Soak all the pennies in the solutions for the same amount of time and then compare results to the control and to each other.
Good Luck
You come up with what chemicals you wish to test. You will want to test multiple coins in the same solution but in different containers so 1 will not effect another.
Your controls would be,
Same amt of liquid in each container
same exact container to hold the liquid
same type coin with roughly the same amount of tarnish/dirtiness
same condition each container must sit in (i.e. keep them all together in 1 spot in the same temp, same amt of light, etc.)
same length of time in the liquid
Controls are the things to keep the same for everything you are doing so you can rule out any differences, like say you use 2 different type of containers, you wouldn't know if it was the chemical or the container that made the difference, so keep as much the same as possible, you control this aspect.|||For the control, I would soak the pennies in water. All the pennies need to be tarnished about the same amount. I've heard that vinegar cleans pennies. Alot of condiments have vinegar in them- ketchup, Texas Pete, salsa. I would use some of those and then maybe do some commercial cleaners, too -like windex, dish soap, fantastic. Soak all the pennies in the solutions for the same amount of time and then compare results to the control and to each other.
Good Luck
What is the control group in an experiment?
Please help I'm SO confused!
I know what independent and dependent variables are and what constants are...but I don't understand what a control is? Please explain and give examples! Best answer wins!|||It is a group that undergoes purposely undergoes no change in an experiment so the things that are changed in another group can be compared to an original. (e.x If I wanted to see the effects of alcohol on a person, I would get one person drunk and have someone who was sober to compare to the drunk, and I would record the changes in the two.)|||The Control Group in any experiment is the group of test subjects which are untreated which you can then compare to.
I know what independent and dependent variables are and what constants are...but I don't understand what a control is? Please explain and give examples! Best answer wins!|||It is a group that undergoes purposely undergoes no change in an experiment so the things that are changed in another group can be compared to an original. (e.x If I wanted to see the effects of alcohol on a person, I would get one person drunk and have someone who was sober to compare to the drunk, and I would record the changes in the two.)|||The Control Group in any experiment is the group of test subjects which are untreated which you can then compare to.
Does the Illuminati a.k.a The Babylonia Brotherhood or The Bilderberg group control football ?
David Icke has said that the world is controlled by shape shifting creatures, who in the day look like normal humans but who at night turn into big hideous reptiles that do terrible things to people. They are called The Illuminati a.k.a The Babylonia Brotherhood and the Bilderberg group are also part of this. Do they control the footballing world ?|||You'd believe it if a regular on Yahoo answers (Sorry to doubt oh thee sacred Yahoo answers!) said so? That sums it up - always use a variety of sources, both pro and against, to come to conclusions such as the one your doing. You appear to have completely bought into the concept to the extent you dont need any evidence anymore.|||They control everything even my mellon and that's saying something oer!|||I think you just described Sepp Blatter.|||Yes they do.
What would be the control group & experimental group be for this experiment?
Im doing it on, does pot size effect how tall the plant grows?Help please!|||control would be either no pot, like freestanding in the same earth as the pots,or a tub for a relatively small plant
experimental different pot sizes starting with about 1 g of earth, like in a test tubewith the rootswrapped coated with say cellophane to limit size...
pick a plant that has a short lifecycle or this is gonna take a looong time lol|||controll group would be a "standered" pot. experimental group would be a different than standerd sized pot
experimental different pot sizes starting with about 1 g of earth, like in a test tubewith the rootswrapped coated with say cellophane to limit size...
pick a plant that has a short lifecycle or this is gonna take a looong time lol|||controll group would be a "standered" pot. experimental group would be a different than standerd sized pot
What would be my control group in hydroponics vs. soil?
Im doing a science project and i dont konw what would be my control group..... Please help|||It depends on the hypothesis you're testing. If you're assertion is that hydrophonics is x compared to soil, then soil is you're control.
If you're testing both, then you're doing 2 experiments and don't have a control, unless you want to put a bunch of seeds in water solely. which would probably be an invalid control
If you're testing both, then you're doing 2 experiments and don't have a control, unless you want to put a bunch of seeds in water solely. which would probably be an invalid control
What is the control group and what is the experimental group?
I'm doing a psychology project and my friend and I had my sister walk around Petsmart with us on a leash acting like dogs to break the social norm. Then we had to observe and write about the people's reactions in the store.|||Control group is the people doing the experiment and the experiment group is the crowd...|||When performing an experiment, the Experimental group is the group who is being experimented on. (So, the people in the store while you are on the leash).
The control group is the group who is not exposed to you on a leash. (So you would have to go into Petsmart on a separate occasion where you are not on a leash to document how people act when things are going normally.)|||The experimental group is the one that recieves the treatment and the control group is the one that doesn't and is used to compare the effects of the experimental group
The control group is the group who is not exposed to you on a leash. (So you would have to go into Petsmart on a separate occasion where you are not on a leash to document how people act when things are going normally.)|||The experimental group is the one that recieves the treatment and the control group is the one that doesn't and is used to compare the effects of the experimental group
What is a control group and experimental group for science fair?
im doing '' the effect of different liquidss on germination of a seed. the different liquids are sprite, water, and nestea|||A control group is a group of test subjects that receive a standard treatment or is not experimented on at all.
The experimental group is the group that receives the "special" treatment.
If the independent variable (type of water received) had its supposed effect, that effect will be reflected as the difference between the control group and experimental group.
So your report would be like this:
e.g AIM and Hypothesis:
To find out what effects Sprite, water and tea have on seed germination
We hypothesize that a seed that receives water will germinate the best.
As a control, a seed is given nothing.
Seed 1,2 and 3 is given water, sprite and nestea.
this is your experimental group.
Results: (write whatever happened)
hope it helps
The experimental group is the group that receives the "special" treatment.
If the independent variable (type of water received) had its supposed effect, that effect will be reflected as the difference between the control group and experimental group.
So your report would be like this:
e.g AIM and Hypothesis:
To find out what effects Sprite, water and tea have on seed germination
We hypothesize that a seed that receives water will germinate the best.
As a control, a seed is given nothing.
Seed 1,2 and 3 is given water, sprite and nestea.
this is your experimental group.
Results: (write whatever happened)
hope it helps
What is the difference between a control group and an experimental group?
It is really confusing to me. And I have to have it for tomorrow, plz help me. Thx|||control is a group that is held constant and is not experimented wiht
experimental group is the group that is tanpered with
the only why to say if your product works is to compare it to a control to show that it is better than the normal "control"|||ok thanks a lot
experimental group is the group that is tanpered with
the only why to say if your product works is to compare it to a control to show that it is better than the normal "control"|||ok thanks a lot
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What would be a control group if the independent variable is temperature?
I know ideally it would be no temperature, but since thats not possible, do i just make it room temperature? But what if room temperature was one of the temperatures i was testing at?|||If your experiment was looking at the effect of temperature on enzyme activity then a control would be a tube with no enzyme in for each different temperature.|||An experiment which uses controls is called a controlled experiment, and usually separates research subjects into two groups: An experimental group and a control group. The control group is practically identical to the treatment group, except for the single variable of interest whose effect is being tested.
examples:
In testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Physicians achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. The group receiving the placebo would be the control group, while the group receiving the drug would be the treatment group. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb bias and to isolate the effects of the drug.
In experiments involving a surgical procedure, a sham operated group is used to ensure that the data reflect the effects of the experiment itself, and are not a consequence of the surgery.
In experiments where crop yield is affected (e.g. soil fertility), the experiment can be controlled by assigning the treatments to randomly selected plots of land. This mitigates the effect of different soil composition on the yield.|||maybe could you be more specific? controls vary throughout experiments.
I suggest changing one of your other variables as the control, depending on the nature of your experiment.
examples:
In testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Physicians achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. The group receiving the placebo would be the control group, while the group receiving the drug would be the treatment group. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb bias and to isolate the effects of the drug.
In experiments involving a surgical procedure, a sham operated group is used to ensure that the data reflect the effects of the experiment itself, and are not a consequence of the surgery.
In experiments where crop yield is affected (e.g. soil fertility), the experiment can be controlled by assigning the treatments to randomly selected plots of land. This mitigates the effect of different soil composition on the yield.|||maybe could you be more specific? controls vary throughout experiments.
I suggest changing one of your other variables as the control, depending on the nature of your experiment.
What is a control group, independent variable and a dependent variable?
I know that a variable is something that can be changed but I dont understand. If you could answer my question and also give a brief example that would be great. Thanks!|||This is usually an easy one to understand-
The more you water plants, the more they grow.
In this example, the independent variable would be water on the plants, because that is what you know you are going to be changing. The dependent variable will be plant growth, because it depends on how much water you give the plants. The control would be plants that aren't being watered, because control is what you compare the results to. If you just watered the plants, you wouldn't know if it has an affect unless you have something to compare it to, such as plants that have no water.
The more you water plants, the more they grow.
In this example, the independent variable would be water on the plants, because that is what you know you are going to be changing. The dependent variable will be plant growth, because it depends on how much water you give the plants. The control would be plants that aren't being watered, because control is what you compare the results to. If you just watered the plants, you wouldn't know if it has an affect unless you have something to compare it to, such as plants that have no water.
Why is a control group necessary in the experimental method?
why is a control group necessary in the experimental method?|||Scientific controls allow experiments to study one variable at a time, and are a vital part of the scientific method. In a controlled experiment, two virtually identical experiments are conducted. In one of them, the treatment, the factor being tested is applied. In the other, the control, the factor being tested is not applied.
For example, in testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Doctors achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb bias and to isolate the effects of the drug.
For example we take twenty rats, we give half of them a medicine and the other half no medicine so any difference that is measured between the two groups should be a result of the medicine's effect. Ya-yah.
For example, in testing a drug, it is important to carefully verify that the supposed effects of the drug are produced only by the drug itself. Doctors achieve this with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one of which receives the drug and one of which receives a placebo. Neither the patients nor the doctor know which group receives the real drug, which serves both to curb bias and to isolate the effects of the drug.
For example we take twenty rats, we give half of them a medicine and the other half no medicine so any difference that is measured between the two groups should be a result of the medicine's effect. Ya-yah.
What is the control group in this experiment?
Hypothesis: Most people will commit a crime if opportunity present.
What kind of experiment can i do in a "control group"???|||This question is not operationally defined well enough to determine what the control group would be. You are asking us to design the experiment for you, not tell you what the control group is.In your question, there is no comparison between groups and no control group exists.
One thing that you can do is to frame your question in such a way that you are testing the propensity to commit a crime based on the likelihood that a person would get caught. For example, you could set up a situation where people think they will get caught and people aren't warned that they could get caught. For example, in one situation a video camera is clearly visible and people are warned that they are videotaped. The control group is one where they are videotaped, but it is not obvious or even seen and they are not warned. Thus, you have a situation where people think they are likely to get caught vs. one in which they feel free to do as they please. Make it in a store where money is made available, but people walk off and leave the money and people could either take it or leave it until the people return.
What kind of experiment can i do in a "control group"???|||This question is not operationally defined well enough to determine what the control group would be. You are asking us to design the experiment for you, not tell you what the control group is.In your question, there is no comparison between groups and no control group exists.
One thing that you can do is to frame your question in such a way that you are testing the propensity to commit a crime based on the likelihood that a person would get caught. For example, you could set up a situation where people think they will get caught and people aren't warned that they could get caught. For example, in one situation a video camera is clearly visible and people are warned that they are videotaped. The control group is one where they are videotaped, but it is not obvious or even seen and they are not warned. Thus, you have a situation where people think they are likely to get caught vs. one in which they feel free to do as they please. Make it in a store where money is made available, but people walk off and leave the money and people could either take it or leave it until the people return.
What is the control group in this experiment?
3 cars, one car has a small straw, the other a medium and the last a large straw. i'm testing for which will go faster for the project.
what would be the control group? thanks.|||The control group would be a car with no straw|||Medium, as this is the one you're comparing the other results to.|||There really is no control. The control would be a car without a straw at all. You would test that car to get your base numbers. Then test other cars with different size straws, and compare the results to the base numbers. The cars with the straws make up the experimental group.
I hope I helped you. To be honest, I'm confused as to what you mean by "straws." LOL
what would be the control group? thanks.|||The control group would be a car with no straw|||Medium, as this is the one you're comparing the other results to.|||There really is no control. The control would be a car without a straw at all. You would test that car to get your base numbers. Then test other cars with different size straws, and compare the results to the base numbers. The cars with the straws make up the experimental group.
I hope I helped you. To be honest, I'm confused as to what you mean by "straws." LOL
What is the control group in this experiment?
In the experiment, we were measuring the pH of various liquids. I know that the independent variable is the type of liquid used but I have no ideas what the control group could be.
Please please please answer as soon as possible
Thanks|||if the independent variable is type of liquids than the control group be using water (pH is neutral)
experimental group: group that uses different types of liquids other than water.
Please please please answer as soon as possible
Thanks|||if the independent variable is type of liquids than the control group be using water (pH is neutral)
experimental group: group that uses different types of liquids other than water.
I need help finding the control group in a potential science fair project?
Please answer the question and not agree of or disagree with my hypothesis. Can there be a control group in this?
Hypothesis: Teenagers will score better on the Big Brain Academy game then adults because they are using thinking, memorizing, analyzing, computing, and identifying skills more often then adults.|||sorry but i couldnt think of one. and the control group doesnt have anything to do with the scores
Hypothesis: Teenagers will score better on the Big Brain Academy game then adults because they are using thinking, memorizing, analyzing, computing, and identifying skills more often then adults.|||sorry but i couldnt think of one. and the control group doesnt have anything to do with the scores
What is the control group in this experiment?
I am doing a science experiment with plants. There is six plants and 3 are in one group and 3 are in the other. My group is watering 3 of the plants everyday and the other 3 are getting watered every other day. The amount of growth in the plants depends on the freguency of watering. What would be the control group in this experiment.|||it could almost be that either one is the control group depending on the norm for how oftem this type of plant should be watered.
i would go with the group getting watered everyday is the control group
i would go with the group getting watered everyday is the control group
What control group could you add to this experiment? (photosynthesis)?
Another test question that i didn't know /:
It was like a beaker with water and a plant inside of it. They measured the distance from the light source and the number of gas bubbles produced.
the question was what was a good question to investigate in the experiment,
and a control group you could add.|||Well, you need something to compare the beaker with water and the plant inside of it to.
So, how about a beaker without a plant inside of it?
Your question will be, "Does the presence of the plant have an effect on the number of bubbles produced?
Another comparison could be made to a plant in the water that has foil over it to prevent it from being exposed to the light.
The question for this would be does the presence of light have an effect on the number of bubbles produced?|||There are several things you could be testing for, but a possible control group would be to have everything the same, except no light source, and measure the number of gas bubbles produced. The question would be if light impacts the gas bubbles.
It was like a beaker with water and a plant inside of it. They measured the distance from the light source and the number of gas bubbles produced.
the question was what was a good question to investigate in the experiment,
and a control group you could add.|||Well, you need something to compare the beaker with water and the plant inside of it to.
So, how about a beaker without a plant inside of it?
Your question will be, "Does the presence of the plant have an effect on the number of bubbles produced?
Another comparison could be made to a plant in the water that has foil over it to prevent it from being exposed to the light.
The question for this would be does the presence of light have an effect on the number of bubbles produced?|||There are several things you could be testing for, but a possible control group would be to have everything the same, except no light source, and measure the number of gas bubbles produced. The question would be if light impacts the gas bubbles.
What is a vehicle control group?
I was reading some research studies about toxicological models and they commonly mention a "vehicle control group", so i'm just wondering if anyone know what this means.
I thought it's a positive control group or a placebo group but i hope to have definite answers, thanks!|||Read that
http://www.epa.gov/iris/toxreviews/0436-鈥?/a>
I thought it's a positive control group or a placebo group but i hope to have definite answers, thanks!|||Read that
http://www.epa.gov/iris/toxreviews/0436-鈥?/a>
If you are part of a group that is testing a new drug 25% of the control group given placebo would you conclud?
And 46 % of the experimental group given the drug reported an improvement in their symptoms. WOuld you conclude that this is an effective drug? What other variable might be present in the study participants that might have influenced which patients benefited from the new Drug?|||Among other things, it depends a lot on sample size. If your 25% is one in a control group of four, that could pretty well represent anything. 1000 out of 4000 you might take to the bank.
As you mentioned, there are usually a lot of confounding variables, but you have to look more into the study design and any known differences in the control group and the treatment group to comment on them.
As you mentioned, there are usually a lot of confounding variables, but you have to look more into the study design and any known differences in the control group and the treatment group to comment on them.
The control group in an experiment is given all the same treatments as the. there is moree..?
The control group in a experiment is given all the same treatments as the experimental group(s) except for the one variable being tested..?
True or False?|||True.
True or False?|||True.
What is the control group? Does the age groups 13-19 and 45-older peripheral Vision affected by their age?
In this test what would be the control group?|||In any objective scientific experiment, there is a test group and a control group. The control group is the same kind in terms of age, size, gender, location, etc as the test group. But the test group is affected by whatever is being tried out.
For example, pretend we believe that hearing is not affected by loud noise for one minute. Two groups of twenty people randomly selected are separated.
One is exposed to loud noise for one minute. This is the test group. The other group is not exposed to the loud noise. They are the control. If the control has better hearing than the test group after the loud noise for one minute, then the hypothesis is not proved and loud music does affect hearing.
In your question, people over 45 are indeed affected by loss of vision. It is normal and called presbyopia. Distance vision is usually not affected but close reading vision deteriorates.
In this case the control group is the younger group, as they are not affected by age; the hypothesis being: "ageing causes vision loss." In which case I am confident the hypothesis would be proved.
For example, pretend we believe that hearing is not affected by loud noise for one minute. Two groups of twenty people randomly selected are separated.
One is exposed to loud noise for one minute. This is the test group. The other group is not exposed to the loud noise. They are the control. If the control has better hearing than the test group after the loud noise for one minute, then the hypothesis is not proved and loud music does affect hearing.
In your question, people over 45 are indeed affected by loss of vision. It is normal and called presbyopia. Distance vision is usually not affected but close reading vision deteriorates.
In this case the control group is the younger group, as they are not affected by age; the hypothesis being: "ageing causes vision loss." In which case I am confident the hypothesis would be proved.
What is a control or control group?
For Biology, I am doing a review sheet for my final exams. What is a control or control group?|||When you set up an experiment, you have one group that you treat in a particular way (experimental group) and another that is identical but not treated (control). The treatment is the independent variable; what happens because of the treatment is the dependent variable.
For example, you test the effect of a chemical on the rate of mortality in daphnia. Daphnia in plain water are the control group; the ones in water with the chemical are the experimental groups. Concentration of the chemical is the independent variable. Death rate is the dependent variable.
For example, you test the effect of a chemical on the rate of mortality in daphnia. Daphnia in plain water are the control group; the ones in water with the chemical are the experimental groups. Concentration of the chemical is the independent variable. Death rate is the dependent variable.
What is the name of that computer game where you control a group of plastic soldiers?
You control a group of soldiers, i remember there was this flame throwing soldier, a sniper, a leader, a mine detector.. they also have a tank that heals..they are plastic so they melt when they die.. you can also build plastic watchtowers and barricades..
i really like this game, i just forgot its name..
can someone help me?
thanks :)|||army men|||ARMY MEN! THAT GAME WAS AWESOME!|||Army Men: RTS
i really like this game, i just forgot its name..
can someone help me?
thanks :)|||army men|||ARMY MEN! THAT GAME WAS AWESOME!|||Army Men: RTS
Can you disactivate your facebook but still be in control of a group?
I am a part of a club and its important that we send out info through facebook. however i want to get rid of my facebook but if i do can i still be in control a group?|||No you can't. Unless you create a group that is not on facebook!
Monday, December 12, 2011
Is a double-blind study, the same thing as a study with a control group?
Hi everyone
Is a double-blind study, the same thing as a study with a control group? Do scientific studies need to be double-blind to be valid?
I am thinking of a particular case, but it's sort of long, so I hoped a general question would suffice. Thank you for your answers =)|||No. A single blind experiment is where the control and experimental groups are not aware of what group they are in. A double blind is where both the experimenter and the participants are unaware of which group participants are in.|||You know, I think a double blind study is where neither the people administering the treatment or the recipients know if they are getting the real deal or the placebo. A study with a control group is just one where the real treatment isn't given to some. Now, don't take my word for it. If need be use google and look it up. That's just what I seem to remember and I'm too lazy to do the research myself. Double blind procedures certainly help with validity.
Alex, what are you saying "No" to me for? I basically said the same thing you are saying. You said a double blind is where both the experimenter(that's the people administering the treatment) and the participants(that is recipients of the treatment) are unaware which group they are in(they don't know if they are getting the real deal or the placebo). It makes me think you just looked your answer up online and have no idea what I'm talking about. But, to expand on what I said earlier, yes double blinds do help with validity. Say there are two groups. One group gets an anti-depressant, and the other gets a placebo. If the person administering the treatment, the experimenter, knows which recipient got the real medicine and believes that the anti-depressant will work they may record the symptoms of those that got the anti-depressant as less depressive than those than those that did not even if there is no difference. If they do not know which got the anti-depressant and which got the placebo then their beliefs about the affectiveness of the anti-depressant will not affect their results of experiment.
Is a double-blind study, the same thing as a study with a control group? Do scientific studies need to be double-blind to be valid?
I am thinking of a particular case, but it's sort of long, so I hoped a general question would suffice. Thank you for your answers =)|||No. A single blind experiment is where the control and experimental groups are not aware of what group they are in. A double blind is where both the experimenter and the participants are unaware of which group participants are in.|||You know, I think a double blind study is where neither the people administering the treatment or the recipients know if they are getting the real deal or the placebo. A study with a control group is just one where the real treatment isn't given to some. Now, don't take my word for it. If need be use google and look it up. That's just what I seem to remember and I'm too lazy to do the research myself. Double blind procedures certainly help with validity.
Alex, what are you saying "No" to me for? I basically said the same thing you are saying. You said a double blind is where both the experimenter(that's the people administering the treatment) and the participants(that is recipients of the treatment) are unaware which group they are in(they don't know if they are getting the real deal or the placebo). It makes me think you just looked your answer up online and have no idea what I'm talking about. But, to expand on what I said earlier, yes double blinds do help with validity. Say there are two groups. One group gets an anti-depressant, and the other gets a placebo. If the person administering the treatment, the experimenter, knows which recipient got the real medicine and believes that the anti-depressant will work they may record the symptoms of those that got the anti-depressant as less depressive than those than those that did not even if there is no difference. If they do not know which got the anti-depressant and which got the placebo then their beliefs about the affectiveness of the anti-depressant will not affect their results of experiment.
What is the control group, independent, dependent variable, or constants? (look below)?
How do different rocks affect how the rock absorbs water? What is the control group, independent, dependent variable, or constants, for this experiment|||independent variable- different types of rocks
control rocks- a normal rock
dependent variable- how much water the rock absorbs
constants- how much water each rock gets, time the rock get the water, where the rock is placed etc.|||The control group is the basic rock. The independent variable is the different types of rocks. The constant is the amount of water you submerge them in and the size of the rocks.|||control would be the amount of water you use for each rock, dependent is the amount of water it absorbs, and independent is the types of rocks, i think.
control rocks- a normal rock
dependent variable- how much water the rock absorbs
constants- how much water each rock gets, time the rock get the water, where the rock is placed etc.|||The control group is the basic rock. The independent variable is the different types of rocks. The constant is the amount of water you submerge them in and the size of the rocks.|||control would be the amount of water you use for each rock, dependent is the amount of water it absorbs, and independent is the types of rocks, i think.
What is the control group in this?
Two students wanted to test the effect of different wire sizes on the strength of a magnet. They used 6 identical nails and wrapped each nail with 6 different sizes of wire. The nails were hooked to 2 D cell batteries to make them electromagnets. The strength of the magnet was tested by the number of paper clips it picked up.
What is the control group?|||There is no control group in the experiment as described.
A control group is used when testing the possibility that one change is significant.
In this case a control group could be created.
We could take several identical nails wrapped with an identical sized wire to establish that the forces do NOT change if we do NOT alter the wire.
What is the control group?|||There is no control group in the experiment as described.
A control group is used when testing the possibility that one change is significant.
In this case a control group could be created.
We could take several identical nails wrapped with an identical sized wire to establish that the forces do NOT change if we do NOT alter the wire.
What does "the difference between a treatment group and a control group is of 0.2 standard deviations" mean?
I'm reading a research paper but can't remember whether the standard deviation relates to the mean of each group or to something else? How would you rephrase this statement?|||The standard deviation is a measure of how "spread out" the data is, i.e. a measure of how far data is from the mean, on average. Well actually there is a square involved. To be precise, if there are n data points, x1, x2 all the way to xn, then:
s.d. = sqrt root of ( [ (x1-mean)^2 + (x2-mean)^2 + ... + (xn-mean)^2] / n)
..........( NOTE CORRECTION "/n" not "/2")
= sqrt root of (average (distance squared) from the mean)
The standard deviation has the same units as the quantity being measured. So if it's a set of women's weights, the standard deviation might be 10 kg, meaning "0.2 standard deviation" is 0.2 times 10 kg = 2 kg,
EDIT: Corrected a silly typo
s.d. = sqrt root of ( [ (x1-mean)^2 + (x2-mean)^2 + ... + (xn-mean)^2] / n)
..........( NOTE CORRECTION "/n" not "/2")
= sqrt root of (average (distance squared) from the mean)
The standard deviation has the same units as the quantity being measured. So if it's a set of women's weights, the standard deviation might be 10 kg, meaning "0.2 standard deviation" is 0.2 times 10 kg = 2 kg,
EDIT: Corrected a silly typo
Which group is control group and variable group?
Suppose a scientist wants to test a new drug to fight the flu. The scientist injects the drug into three people with the flu. The scientist injects a harmless solution into three other people with the flu. In this experiment, what is the variable group and what is the control group?|||the Control group would be the harmless solution
the Variable group would be the Drug he injected into the three people
Hope it helps :D
the Variable group would be the Drug he injected into the three people
Hope it helps :D
Experimental vs. control group and teaching tool. How to do it ethically?
How can you use a teaching tool on the experimental group while not using a teaching tool on the control group? Is that ethical in a research? If not, how would you have 2 groups using a teaching tool?|||If what you are testing is the effectiveness of the teaching tool then you would not use it on the control group. It's ethical in research if you tell participants before the start of the experiment and they agree to participate and sign a statement (both groups aware that one will have the tool and the other won't .) You would not lets say take a two seperate classes of children and give one class the teaching tool and not the other. That would be unethical because they wouldn't be aware that one group will be at a disadvantage in the experiment.
If you have both groups using the teaching tool, then that is not what you are testing. Remember when you are performing an experiment everything has to be equal in both groups except what you are testing.|||There would be no ethical problem if it has not been determined which of the teaching tools is better.
If you have both groups using the teaching tool, then that is not what you are testing. Remember when you are performing an experiment everything has to be equal in both groups except what you are testing.|||There would be no ethical problem if it has not been determined which of the teaching tools is better.
Identify Experimental and Control Group In The Experiment?
John Obtains Two Healthy Plants Of The Same Variety And Size.He Plants Each Plant In The Same Type of Pot%26amp;The Same Brand Of Potting mix.He Then Places Both Plants In The Same Window of The House.He Waters PlantA every Other day with 250ML of Water %26amp;Waters Plant B once A Week With 250ML water.He Measures The Height Of The Plants Once a Week For 6Weeks
Identify The Experimental and Control Group In The Experiment|||First don't capitalize every word it gives people headaches when they try to read it. Second it would most likely be plant A but you could argue that it is impossible to determine the control and the experimental group due to the fact that the hypothesis was not given. If it said something along the lines of John wished to test the effects of increased time between watering of plants on the height of said plant it would make sense but because it doesn't the best answer would be that there can be no determination due to the ambiguity of the question and the lack of details to what the data that was gathered from the experiment was attempting to answer.
Identify The Experimental and Control Group In The Experiment|||First don't capitalize every word it gives people headaches when they try to read it. Second it would most likely be plant A but you could argue that it is impossible to determine the control and the experimental group due to the fact that the hypothesis was not given. If it said something along the lines of John wished to test the effects of increased time between watering of plants on the height of said plant it would make sense but because it doesn't the best answer would be that there can be no determination due to the ambiguity of the question and the lack of details to what the data that was gathered from the experiment was attempting to answer.
What could happen if you don't have a Control group within your experiment?
what could happen if you don't have a Control group within an experiment you are conducting?|||you'll have nothing to compare your results to. if your testing the effect of heat on the amount of bacteria in water and you just heat water and test it, but don't test a non heated water, then your results will mean nothing|||well say you are making a paint out of a new resin. Somebody says well the dry time is 2 hours - is that good or bad - you don't know, By putting a control in you can say, well the dry time is two hours 10 minutes and our control (our existing paint -or a competitor ) is 2 hours - so the dry time is marginally slower. In an experiment , a control is always desirable so one can measure a property against
known quantity.|||The purpose of an experiment is to test a hypothesis. In order to test said hypothesis, one must compare the effects of change on one variable in a system versus the system without changes. By doing so, a statement may be made whether or not the tested variable has an effect on the system.
known quantity.|||The purpose of an experiment is to test a hypothesis. In order to test said hypothesis, one must compare the effects of change on one variable in a system versus the system without changes. By doing so, a statement may be made whether or not the tested variable has an effect on the system.
How do you control a group of people?
I'm in eighth grade, and directing a movie in my multimedia class. The five other people I work with constantly get off track, screw around, argue, and complain that we got nothing done afterward. I try to get everyone going, but we can only get a couple shots done over an entire period. The video is due in a week, and we only have a few scenes done. Does anyone have any idea how to control a group of people better?|||If they don't have any interest in this activity,why did they take part in it.
I had the same exprienced when I was eithth.
Finally,I realized that I should let them know ~This is not a duty ,You mast have fun!
Until everybody exibit the movie,get all audience's clap!
Isn't that a huge achievement!|||Call your local SWAT or buy a can of mace from your local bounty hunting depo
I had the same exprienced when I was eithth.
Finally,I realized that I should let them know ~This is not a duty ,You mast have fun!
Until everybody exibit the movie,get all audience's clap!
Isn't that a huge achievement!|||Call your local SWAT or buy a can of mace from your local bounty hunting depo
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