Let x represent a binomial random variable with parameters n and p. Show that (a) E(x) : = n(n − 1)p²; (c) E[x(x - 1)(x − 2)] mp; (b) E[x(x − 1)] - = - - 1)(n − 2)p³; -

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5-25 Let x represent a binomial random variable with parameters n and p. Show that (a) E(x) =
n(n − 1)p²; (c) E[x(x − 1)(x − 2)]
-
=
n(n − 1)(n − 2)p³;
np; (b) E[x(x − 1)]
(d) Compute E (x²) and E(x³).
=
Transcribed Image Text:5-25 Let x represent a binomial random variable with parameters n and p. Show that (a) E(x) = n(n − 1)p²; (c) E[x(x − 1)(x − 2)] - = n(n − 1)(n − 2)p³; np; (b) E[x(x − 1)] (d) Compute E (x²) and E(x³). =
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