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Returns the Poisson distribution. The Poisson distribution is often used to predict the number of events that occur over a period of time, such as the number of cars passing through a toll booth in one minute.
Grammar
POISSON(x,mean,cumulative)
X number of events.
Mean expected value.
Cumulative A logical value that determines the form of the probability distribution returned. If cumulative is TRUE, function POISSON returns Poisson cumulative
Distribution probability, that is, the number of random events occurring is between 0 and x (including 0 and 1); if it is FALSE, the Poisson probability density function is returned, that is
The random event occurs exactly x times.
Description
￭If x is not an integer, it will be truncated.
￭If x or mean is non-numeric, POISSON returns the error value #VALUE!.
￭If x < 0, POISSON returns the error value #NUM!.
￭If mean ≤ 0, POISSON returns the error value #NUM!.
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