For F2006 the MAT540
Number of Students earning each letter grade was
Grades in Last Terms Number
If this term is representative of each terms performance what is the probability of a student receiving each grade?
Calculate the mean and standard deviation
if A=4, etc.
The total number of students = 117 + 140 + 101 +57 = 415
Then Prob(A) = 117 / 415 = 28.19%
Prob(B) = ...
The calculations to find the standard deviation and the mean of class grades is given in the solution.