Question: A test question is considered good if it discriminates between prepared and unprepared students. The first question on a test was answered correctly by 62

A test question is considered good if it discriminates between prepared and unprepared students. The first question on a test was answered correctly by 62 of 80 prepared students and by 23 of 50 unprepared students. At the 0.05 level of significance, test the claim that this question was answered correctly by a greater proportion of prepared students.

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