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What percent of students score

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Scores on a university exam are Normally distributed, with a mean of 78 and a standard deviation of 8. The professor teaching the class declares that a score of 70 or higher is required for a grade of at least C.

(a) What percent of students score below 72?

(b) If 16 students are randomly selected, what is the probability their mean score is below 72?

(c) The top 15% of students in the course made an A. What is the cut-off score for an A?

(d) Calculate the median.

Reference no: EM132362767

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