In a college freshman English course, the following 20 grades were recorded
48 88 47 39 45 44 98 76 84 54
67 91 84 38 75 38 35 82 42 82
Find the:
a. Quartiles for the above data set
b. Range for the above data set
c. Mean for the above data set
d. Variance for the above data set
e. Coefficient of variation for the above data set