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    Quantitative Methods: Probability Distribution

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    If X has the following probability distribution

    X 1 2 3 4
    P(X) .1 .5 .2 .2

    Compute the standard deviation of X.

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    Solution Preview

    First calculate expected value of X i.e. E(X)
    E(X) = summation of ...

    Solution Summary

    Quantitative Methods are examined.