Poisson distribution

Say for example X is a random variable following a poisson distribution with mean 0.141. Is there a way to determine E(X^2)?

Thanks in advance

Hi,

Consider the facts:

1. E(X) = Var(X) = 0.141, for a Poisson random variable X.

2. Var(X) = E(X^2) - {E(X)}^2.

Thanks!

Cheers,
Wen Shih

thanks for your helps :)