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    Mean and Variance of Random Variables

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    Let X equal an integer selected at random from the first m positive integer, {1, 2, ..., m}.
    (a) Give the values of E(X) and Var(X).
    (b) Find the value of m for which E(X)=Var(X). (See Zerger in the references)

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    Solution Summary

    The solution describes the determination of the mean and variance of a discrete random variable.