74. Show that E(X) np when X is a binomial random variable. [Hint: First express E(X)...
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74. Show that E(X) np when X is a binomial random variable. [Hint: First express E(X) as a sum with lower limit x 1. Then factor out np, let y x 1 so that the sum is from y0 to yn1, and show that the sum equals 1.]
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Related Book For 
Modern Mathematical Statistics With Applications
ISBN: 9780534404734
1st Edition
Authors: Jay L Devore
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