Question: 9.2.3 Instead of (9.23), write X = 71 + 772 + + qa, where qj = 1 or 0 depending on whether or

9.2.3 Instead of (9.23), write X = 71 + 772 + ’ ’ + qa, where qj = 1 or 0 depending on whether or not the jth element representing success was selected. Use this representation to derive formulas for the mean and variance of X as given in Theorem 9.2.2.

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