stats_dens_pmf_poisson

(PECL stats >= 1.0.0)

stats_dens_pmf_poissonProbability mass function of the Poisson distribution

Descripción

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.

Par√°metros

x

The value at which the probability mass is calculated

lb

The parameter of the Poisson distribution

Valores devueltos

The probability mass at x or false for failure.

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