Question: . A statistics class was given a pretest on probability (since many had previous experience in some other class). Then the class was given a

. A statistics class was given a pretest on probability (since many had previous experience in some other class). Then the class was given a six-page review handout to study for two days. At the next class they were given another test. Is there sufficient evidence that the scores improved? Use a=0.05 .

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Pretest

Posttest

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