What are the correct terms for taking of the medication and the growth of hair in the following study?
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You are conducting a study to see whether a new experimental medication will cause bald men to grow hair. You divide your patients into 2 groups. To one group you give the medication. To the other group, you give a placebo.
The medication is the independent variable, and the hair growth is the dependent variable.
The independent variable does not depend on anything else in the experiment. Thus, whether the patient does or does not take the medication is the independent variable. It has 2 possible values: yes or no. The amount of hair growth is the dependent variable, since (theoretically) it depends on whether the patient takes the medication.
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