Poisson

Syntax

Poisson(EventCount, Mean, Cumulative)

EventCount. The number of events. The value must satisfy the constraint: EventCount > 0.

Mean. Expected numeric value.

Cumulative. Boolean values that defines form of returned probability distribution:

True. This method returns the integral Poisson distribution, that is, the probability for a number of random events to be between 0 and EventCount inclusive.
False. The method returns the Poisson distribution density function, that is, the probability for the number of events to be exactly as much as EventCount.

The method returns the Poisson distribution.

The Poisson distribution is usually used to predict the number of events occurring within a certain period.