# poisson distribution.

• May 30th 2010, 05:35 AM
Suchy
poisson distribution.
The number of customers entering the store every 15 minutes follow a Poisson distribution with the parameter λ=2. Calculate the probability that 6 or more customers visit the store within an hour.
• May 30th 2010, 05:41 AM
mr fantastic
Quote:

Originally Posted by Suchy
The number of customers entering the store every 15 minutes follow a Poisson distribution with the parameter λ=2. Calculate the probability that 6 or more customers visit the store within an hour.

X ~ Poisson $(\lambda = (2)(4) = 8)$.
Calculate $\Pr(X \geq 6) = 1 - \Pr(X \leq 5)$.