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POISSON

The POISSON function returns the probability that a specific number of events will occur using the Poisson distribution.

POISSON(events, average, form-type)

events: A number value representing the number of events (arrivals) for which you want to calculate the probability.

average: A number value representing the known average (arithmetic mean) rate at which events occur.

form-type: A modal value that indicates which form of the exponential function to provide.

cumulative form (TRUE or 1): Return the value of the cumulative distribution form (that the specified number or fewer successes or events will occur).

probability mass form (FALSE or 0): Return the value of the probability mass form (that there are exactly the specified number of successes or events).

Example
For a mean of 10 and an arrival rate of 8: =POISSON(8, 10, FALSE) returns approximately 0.11259903214902.

Example

For a mean of 10 and an arrival rate of 8:

=POISSON(8, 10, FALSE) returns approximately 0.11259903214902.

See alsoEXPONDIST

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POISSON