In a series of observations, S.D.=7 and mean is 28, the coefficient of variation is
A
4
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B
1/4
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C
25
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D
12.5
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Solution
The correct option is C25 The coefficient of variation (Cv) is defined as the ratio of the standard deviation σ to the mean μ Cv=σμ×100 Cv=728×100 Cv=14×100 Cv=25