Having done poorly on their math final exams in June, six students repeat the course in summer

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Having done poorly on their math final exams in June, six students repeat the course in summer school, and then take another exam in August. If we consider these students representative of all students who might attend this summer school in other years, explain why you can't use the methods discussed in this chapter to test whether the class was beneficial.
June 54 49 68 66 62 62
Aug. 50 65 74 64 68 72
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Stats Data And Models

ISBN: 662

4th Edition

Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock

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