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OpenStudy (anonymous):
An instructor standardized her midterm and final each semester so the class average is 50 and the SD is 10 on both tests. The correlation between the tests is around 0.5 . One semester ,she took all the students who scored around 30 at the midterm. and gave them special tutoring . On average, they gained 10 points on the final . Can this be explained by the regression effect?
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