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Professor Kingsfield’s class follows very strict grading guidelines

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Professor Kingsfield’s class follows very strict grading guidelines. Assume that student average in Kingfield’s class are normally distributed with a mean of 62 points and a standard deviation of 12 points. Professor Kingsfield wants letter grades in his class to have a very specific distribution: 68 percent of students get Cs, 13.5 percent get Ds, 13.5 percent get Bs, 2.5 percent receive Fs, and the top 2.5 percent get As. What should be the numeric range for each letter grade? Refer to Figure 6-5 for help answering this question.

A. Student with ____ or above get As.

B. Student with averages between ____ and ___ get Bs.

C. Student with average between ___ and ____ get Cs.

D. Student with averages between ___ and ___ get Ds.

E. Student with ___ or below get Fs.