Which of the following is the best description of a control for an experiment?

Question

Quizplus · Accepted Answer

A control group is used in an experiment to provide a baseline for comparison with the experimental group. It is important that the control group is matched with the experimental group except for the one variable being tested, which is why B is the best choice. A is incorrect because the control group does not have to be kept in an unchanging environment. C is incorrect because the control group may be exposed to multiple variables, as long as the experimental variable is the only one that differs between the two groups. D is incorrect because both the experimental and control group should be tested or measured. E is incorrect because the control group is not simply left alone, but rather serves as a comparison group for the experimental group.

Which of the Following Is the Best Description of a Control