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    Compute Standard Deviation from a frequency table

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    X P(X=x)

    (5 @ .12)
    (6 @ .24)
    (8 @ .44)
    (10 @ .20)

    What is the standard deviation of X?

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    Solution Preview

    So, standard deviation is computed as follows...


    So to find E(x) (the mean) we ...

    Solution Summary

    A step-by-step solution shows the student how to calculate the standard deviation given a probability distribution.