Suppose X has a Poisson Distribution with parameter U. Given any integer r>= 1. Show that E[x(x-1)(x-2)...(x-r+1)]=U^r ?

09 September 2016 0 8K Report

And Also deduce the coefficient of skewness of X.

The coefficient of skewness of random variable Y with mean U and variance >0, is E((Y-U)^3)/sigma^3

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