# Poisson



• $X$ is Poisson Distributed
• $x$ equals the number of success in the interval
• $x = 0,1,2,\ldots$
• $0<\lambda$
• $\mu = E(X) = \lambda$
• $\sigma^2 = V(X)= \lambda$
\defs{Examples}
• The number of car accidents at NIDA in a month
• The number of paint imperfections on a Toyota car produced
• The number of phone calls in a day