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    expected value and standard deviation of discrete variable

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    What is the mean (expected value) of the following probability distribution?

    X 0 1 2 3 4 5
    P(x) 0.17 0.15 0.25 0.08 0.15 0.2

    Find the standard deviation for the probability distribution in #19.

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    Solution Summary

    The solution explains how to calculate the expected value and standard deviation of a discrete random variable.