Let X the number of flaws on the surface of a randomly selec

Let X, the number of flaws on the surface of a randomly selected boiler of a certain type, have a Poisson distribution with parameter = 5. Use the cumulative Poisson probabilities from the Appendix Tables to compute the following probabilities. (Round your answers to three decimal places.) (a)    P(X 7)

Solution

Using a table, with mean = 5, and critical x value = 7,

P(x<=7) = 0.866628326 = 0.867 [ANSWER]