the mean? (b) Compute your own z-score. Were you above or below the mean? (c) Create a histogram for the letter grades A, B, C, D, and F. (d) Are the letter grades normally distributed? If not, what kind of distribution is it? Can you think of a reason that the scores would not be normally distributed? (e) How might you adjust your study practices to improve your performance the next exam?on
Fig: 1
Fig: 2
Fig: 3
Fig: 4
Fig: 5
Fig: 6
Fig: 7