Assign more grades. Refer to the previous exercise.

The grading policy says that the cutoffs for the other grades correspond to the following: the bottom 5% receive an F, the next 10%

receive a D, the next 40% receive a C, and the next 30% receive a B. These cutoffs are based on the N(70, 10) distribution.

(a) Give the cutoffs for the grades in terms of standardized scores.

(b) Give the cutoffs in terms of actual scores.

(c) Do you think that this method of assigning grades is a good one? Give reasons for your answer.