Which of the following accurately describes the benefit, if any, of control in the experiment?
Answer
A
By controlling variables that may influence the response variable, we reduce variability in the response variable.
B
By controlling variables that may influence the response variable, we eliminate variability in the response variable.
C
By controlling variables in the experiment, we eliminate the need to have a control group.
D
There is no benefit of control in the experiment.
Explanation
Controlling variables that could influence the response variable helps keep their effects consistent across the experiment. This reduces unexplained variability, making it easier to detect the effect of the variable being studied. It does not eliminate all variability, and it does not remove the need for a control group.
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