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