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Find the mean and standard deviation for the number of correct answers for such students.

Guessing on an Exam The midterm exam in a nursing course consists of 75 true/false questions. Assume that an unprepared student makes random guesses for each of the answers.

a. Find the mean and standard deviation for the number of correct answers for such students.

b. Would it be unusual for a student to pass this exam by guessing and getting at least 45 correct answers? Why or why not?

Solution:

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