What Is the Purpose for Using a Control Group in an Experiment

question 60

Multiple Choice

What is the purpose for using a control group in an experiment?

• A)​It provides a baseline to evaluate the size of the treatment effect.
• B)​It minimizes the threat of a confounding variable.
• C)It is necessary to ensure the internal validity of the study.
• D)​It is necessary to ensure the external validity of the study.

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