SaT Preparation. A study of 75 students who took an SAT preparation course (American Education Research Journal,
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SaT Preparation. A study of 75 students who took an SAT preparation course (American Education Research Journal, Vol. 19, No. 3) concluded that the mean improvement on the SAT was 0.6 point. If we assume that the preparation course has no effect, the probability of getting a mean improvement of 0.6 point by chance is 0.08. Discuss whether this preparation course results in statistically significant improvement.
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