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29 August, 16:09

A sample of n = 9 scores has a variance of s2 = 144. what is the standard deviation for this sample?

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  1. 29 August, 16:28
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    The relationship between variance and standard deviation is simply:

    s = standard deviation

    s^2 = variance

    s = sqrt (s^2)

    Therefore calculating for s:

    s = sqrt (144)

    s = 12

    So we get the standard deviation is simply 12 scores.
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