# Poisson distribution

• Feb 27th 2011, 08:58 PM
Evan.Kimia
Poisson distribution
LEt X have a Poisson distribution with mean = 4. Show that

P(u -2sigma < X < u +2sigma) = .931

anyone know how i should go about starting this problem? stumped.
• Feb 27th 2011, 09:11 PM
pickslides
What is the CDF and standard deviation of the Poisson distribution?
• Mar 1st 2011, 06:13 PM
matheagle
moo, I mean $\mu=\sigma=4$

So calculate $P(4-8 for a Poisson with moo=4.

which is F(11) btw.