stats_dens_pmf_poisson

Probability mass function of the Poisson distribution

Description

float stats_dens_pmf_poisson(float $x, float $lb)

Returns the probability mass at x, where the random variable follows the Poisson distribution whose parameter is lb.

Parameters

x

The value at which the probability mass is calculated

lb

The parameter of the Poisson distribution

Return Values

The probability mass at x or false for failure.