46 51 52 53 55 55 56 57 58 58 59 60 61 62 62 63 64 67 70 77 What is the coefficient of variation? A. 11.84% B. 9000% C. 56% D. 1%
Solution :
46 51 52 53 55 55 56 57 58 58 59 60 61 62 62 63 64 67 70
77
n = 20
mean = 1186 / 20 = 59.3
s = (x - )2 / n - 1 = 936 / 20 - 1 = 936 / 19 = 49.27368 = 7.01952
CV = s / = 7.01952 / 59.3 * 100% = 0.1184 * 100% = 11.84
A)
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