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16 August, 13:46

These data show the ring size for a sample of 8 men 12 10 11.5,11.5, 12, 9, 9, 11 what is the best approximation of the standard deviation of the ring size data

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  1. 16 August, 16:59
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    Given the data above N=8

    mean is (12+10+11.5+11.5+12+9+9+11) / 8

    thus, mean = 10.75

    Sample standard, s = √ (∑ (x-m) ²) / (n-1)

    = 1.172

    I therefore, believe that the best approximation of standard deviation is 1.17
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