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Professor Ratcliff wants to know if depression (as measured by a 10-item scale) predicts GPA after controlling for the effect of neuroticism (as measured by
Professor Ratcliff wants to know if depression (as measured by a 10-item scale) predicts GPA after controlling for the effect of neuroticism (as measured by a 20-item scale). She should use a(n) principal components analysis correlation test simple linear regression hierarchical regression analysis
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