Dr Swartz is trying to win FDA approval for a new drug to treat anxiety. Dr Swartz claims that 14% of the people who took this new drug reported reduced anxiety; however other researchers claim that 14% of patients who receive no treatment also report reductions in their anxiety levels. It appears that the patients who improved after taking Dr Swartz's drug

Question

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The fact that 14% of patients who receive no treatment also report reductions in anxiety levels suggests that the improvement seen in patients who took Dr Swartz's drug may be due to a placebo effect. It is important to rule out placebo effects when evaluating the efficacy of a new drug.

Dr Swartz Is Trying to Win FDA Approval for a New