Why is it important that an experiment include a control group?
A)A control group provides a reference by which to determine if a particular outcome may reasonably result from the variable being tested.
B)The control group provides a reserve of experimental subjects.
C)A control group is required for the development of an "If ...then" statement.
D)A control group assures that an experiment will be repeatable.

Question

Quizplus · Accepted Answer

A control group is important in an experiment because it provides a reference or baseline against which to compare the results of the group that is being tested. This helps to determine whether any observed differences are due to the independent variable being tested or some other factor. Without a control group, it is difficult to make any meaningful conclusions about the effects of the independent variable.

Why Is It Important That an Experiment Include a Control