Why is it important that experiment include a control group

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Reference no: EM1397927

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

A) It is the group in which the researcher predetermines the nature of the results.

B) It provides a reserve of experimental subjects.

C) It is required for the development of a hypothesis.

D) A) Without it, there is no basis for comparison of results.

Reference no: EM1397927

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