64. Show that E(X) np when X is a binomial random variable. [Hint: First express E(X)...
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64. 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 y 0 to y n 1, and show that the sum equals 1.]
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Related Book For
Probability And Statistics For Engineering And The Sciences
ISBN: 9781111802325
7th Edition
Authors: Dave Ellis, Jay L Devore
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