Biostatistics Quiz
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STUDY DESIGN & DATA
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A researcher investigates whether social media use affects sleep quality in teenagers. Design 1: Survey students about their current social media habits and sleep patterns. Design 2: Randomly assign students to either limit social media to 1 hour daily or continue usual habits for 4 weeks, then measure sleep quality. If Design 1 shows a stronger negative association between social media and sleep than Design 2, what is the most likely explanation?
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