Suppose that on a statistics test the mean greade in a class is 75 and the population standard deviation is 8. Assume that the distribution of grades is bell-shaped.
(a) What percent of students recieved grades between 59 and 91?
(b) What percent of students will reveive grades below 83?
(c) What percent of students will reveive grades between 59 and 83?
(d) If 700 students took the course, how many had a score above 99?
Please show all work and explain if you can how you get the answers.