Question: The Poisson mass function is given by e-A Ax P(X = x) = x! for x = 0,1,2,3,... a. Derive the mean of this

The Poisson mass function is given by e-A Ax P(X = x) = x! for x = 0,1,2,3,... a. Derive the mean of this mass function. b. Derive the variance of this mass function. Hint, consider E[X(X - 1)]. The Poisson mass function is given by e-A Ax P(X = x) = x! for x = 0,1,2,3,... a. Derive the mean of this mass function. b. Derive the variance of this mass function. Hint, consider E[X(X - 1)].

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