The following scores represent the final examination grade for an elementary statistics course :

23 60 79 32 57 74 52 70 82 36

80 77 81 95 41 65 92 85 55 76

52 10 64 75 78 25 80 98 81 67

41 71 83 54 64 72 88 62 74 43

60 78 89 76 84 48 84 90 15 79

34 67 17 82 69 74 63 80 85 61

Using 10 class interval with the lowest starting at 9

a) set up a frequency distribution

b) construct a cumulative frequency distribution

c) construct a frequency histogram

d) construct a smooth cumulative frequency polygon

e) estimate the number of people who made a score of at least 60 but less than 75

f) discuss the skewness of the distribution