stats_dens_pmf_poisson
PHP function
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(PECL stats >= 1.0.0)
Probability mass function of the Poisson distribution
Description
stats_dens_pmf_poisson(float $x, float $lb): float
Returns the probability mass at x, where the random variable follows the Poisson distribution whose parameter is lb.
Parameters
xThe value at which the probability mass is calculated
lbThe parameter of the Poisson distribution
Return Values
The probability mass at x or false for failure.