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The time in minutes to complete a homework by 8 students in a day are given by 38,40,47,44,46,43,49,53. Find the standard deviation

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The time in minutes to complete a homework by 8 students in a day are given by 38,40,47,44,46,43,49,53. Find the standard deviation.

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Arrange in ascending order we get, 38, 40, 43, 44, 46, 47, 49, 53.

Assumed mean = 46

Coefficient of variation = 10.07%

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