SOC.030 Experiments and Quasi-Experiments
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Skill Level🟢 Easy
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Text stimulus (table): Attrition table titled 'Posttest Completion.' Columns: Group, Started Study, Completed Posttest, Missing Posttest. Row 1: Treatment, 80, 56, 24. Row 2: Comparison, 80, 76, 4. What is the main validity concern?