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<stats_dens_exponentialstats_dens_gamma>
^Statistic FunctionsLast updated: Mon, 26 Oct 2026

stats_dens_f

(PECL stats >= 1.0.0)

stats_dens_f — Probability density function of the F distribution

Description

function stats_dens_f(float $x, float $dfr1, float $dfr2): float

Returns the probability density at x, where the random variable follows the F distribution of which the degree of freedoms are dfr1 and dfr2.

Parameters

x

The value at which the probability density is calculated

dfr1

The degree of freedom of the distribution

dfr2

The degree of freedom of the distribution

Return Values

The probability density at x or false for failure.


<stats_dens_exponentialstats_dens_gamma>
^Statistic FunctionsLast updated: Mon, 26 Oct 2026