Question

Why is it important that an experiment include a control group?

A) a control group assured that an experiment will be repeatable.

B) without a control group, there is no basis for knowing if a particular result is due to the variable tested or to some other factor.

C) the control group is the group that the researcher is in control of; it is the group in which the researcher predetermines the nature of the results.

D) the control group provides the reserve of an experimental subjects.

Answer 1

B
(without the control you won't know what a normal result would be without the independent variable).

Answer 2

It the important that an experiment includes a control group, B) without a control group, there is no basis for knowing if a particular result is due to the variable tested or to some other factor.

What is the  controlled experiment?

A controlled experiment is an experiment where the conditions and variables are closely controlled and monitored by the person conducting the experiment.

Therefore, the answer would be b. An experiment that uses carefully controlled conditions

Thus, option "B" is correct.

To learn more about the control Experiment click here:

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