21. Fre=10, standard deviation=13, then coefficient of variation is:
(B) 31
(A) 10
(C) 13
(D) 20
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Answered by
1
Answer:
option D
Step-by-step explanation:
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Answered by
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Answer:
A data set of [100, 100, 100] has constant values. Its standard deviation is 0 and average is 100, giving the coefficient of variation as
0 / 100 = 0
A data set of [90, 100, 110] has more variability. Its sample standard deviation is 10 and its average is 100, giving the coefficient of variation as
10 / 100 = 0.1
A data set of [1, 5, 6, 8, 10, 40, 65, 88] has still more variability. Its standard deviation is 30.78 and its average is 27.9, giving a coefficient of variation of
30.78 / 27.9 = 1.10
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