Assign more grades. Refer to the previous exercise. The grading policy says the cutoffs for the other grades correspond to the following: bottom 5% receive F, next 10% receive D, next 40% receive C, and next 30% receive B. These cutoffs are based on the N(70, 10) distribution.
(a) Give the cutoffs for the grades in this course in terms of standardized scores.
(b) Give the cutoffs in terms of actual total scores.
(c) Do you think that this method of assigning grades is a good one? Give reasons for your answer.