Question: =+2.40 Explain why some studies include both a control group and a placebo treatment. What additional comparisons are possible if both a control group and

=+2.40 Explain why some studies include both a control group and a placebo treatment. What additional comparisons are possible if both a control group and a placebo group are included?

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Explain why some studies include both a control group and a placebo treatment. What additional comparisons are possible if both a control group and a placebo group are included?

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