Show that, for a binomial random variable, E[Y(Y - 1)] = NPQ + 2 - .
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Show that, for a binomial random variable, E[Y(Y - 1)] = NPQ + μ2 - μ. write the expected value as a sum, factor out y(y - 1), and then factor terms until each term in the sum is a binomial probability. Use the fact that ∑y p(y) = 1 to sum the series.
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Related Book For
Statistics For Engineering And The Sciences
ISBN: 9781498728850
6th Edition
Authors: William M. Mendenhall, Terry L. Sincich
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