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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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The Poisson Probability Distribution

If a random variable follows a pattern consistent with a Poisson probability distribution, we can calculate the probability of a certain number of occurrences over a given interval. To make this calculation, we need to know the average number of occurrences for the event over this interval. To demonstrate the use of the Poisson probability distribution, I’ll use this example.
 
The following story is true, but the names have not been changed because nobody in this story is innocent. Not that any of the previous stories have been false, but this one is “really” true. Each year, Brian, John, and I make a golf pilgrimage to Myrtle Beach, South Carolina. On our last night one particular year, we were browsing ...

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