If the mean of 10 observations is 50 and the sum of the squares of the deviations of observations from the mean is 250 , then the coefficient of variation of these observations is

Question

If the mean of 10 observations is 50 and the sum of the squares of the deviations of observations from the mean is 250 , then the coefficient of variation of these observations is, 25, 50, 10, 5

MARKS App · Accepted Answer

Given, x - = 50 ∑ x i - x - 2 = 250 σ 2 = 1 10 × 250 = 25 C . V = S . D x - × 100 = 5 50 × 100 = 10 .

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