Poisson distribution

• quailmaster

  27 Jun 09, 00:04

  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

• wee_ws

  27 Jun 09, 11:21

  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

• quailmaster

  27 Jun 09, 14:30

  hi

  thanks for your helps :)