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.