PoissonInv - script and chart function

PoissonInv() returns the inverse of the accumulated probability of the Poisson distribution.

Syntax:

PoissonInv(prob, mean)

Return data type: number

Arguments
Argument	Description
prob	A probability associated with the Poisson-probability distribution. It must be a number between 0 and 1.
mean	A positive number defining the average outcome.

This function is related to the PoissonDIST function in the following way:
If prob = PoissonDist(value, mean), then PoissonInv(prob, mean) = value

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