Question: The mean grade on a statistics examination was 70 and the standard deviation was 7.

A. The top 8% of the students will receive an “A” What is the minimum grade that a student must get in order to receive an “A”? (round to the nearest whole number grade)

B. If the passing grade is 60, what percent of the class will pass? Round to the nearest percentage.

C. The instructor for the class gives the same test to 50 students the following semester. What is the probability that the mean score for the 50 students is above 73?

D. The instructor gives the exam to one of his classes this semester. However, the instructor was absent, and a substitute administered the exam. The class contains 32 students. The mean score for the 32 students exceeded 75. Is this odd? What should the instructor conclude and why?