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anonymous
 one year ago
The final exam in a sociology course consists of 100 multiplechoice questions. Each question has five possible answers, and only one of them is correct. An unprepared student makes random guesses for all the answers. Find the mean and standard deviations for the number of correct answers for this student.
anonymous
 one year ago
The final exam in a sociology course consists of 100 multiplechoice questions. Each question has five possible answers, and only one of them is correct. An unprepared student makes random guesses for all the answers. Find the mean and standard deviations for the number of correct answers for this student.

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