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8 August, 22:55

Hides is calculating the standard deviation of a data set that has 7 values. He determines that the sum of the squared deviations is 103.

What is the standard deviation of the data set?

(Round to the nearest tenth)

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  1. 8 August, 22:59
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    Standard deviation is the square root of the variance (which is the average of the sum of squared deviations) ...

    sd = (103/7) ^ (1/2) = 3.836 (to the nearest thousandth)
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