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A researcher examined the effectiveness of a new sleep medication compared with placebo. People were randomly assigned to receive the medication or placebo. Sleep times

A researcher examined the effectiveness of a new sleep medication compared with placebo. People were randomly assigned to receive the medication or placebo. Sleep times were measured (in hours). Here are the data: Medication group: M = 6 hrs, SD = 2 hrs, n = 20 Placebo group: M = 5.0 hrs, SD = 3 hrs, n = 20 1. Name the independent and dependent variables

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