Question: Norman called today to say he had found a way for us to model the number of customer phone calls per hour. He had been thinking about other statistical factors that might play into our planning, so he got out some of his old stats texts and started browsing through them. Apparently by using something called a Poisson distribution, we could find the likelihood of large volumes of phone calls during any hour of the day. This could really help with staffing decisions.

Norman had already done a little research into other new bakeries and determined that we could expect an average of 4.4 phone calls per hour. Using a Poisson table, I think I can figure this out.

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What is the probability of more than 3 phone calls per hour?