(PECL stats >= 1.0.0)
stats_rand_gen_noncentral_f — Generates a random deviate from the noncentral F distribution
stats_rand_gen_noncentral_f ( float $dfn , float $dfd , float $xnonc ) : float
Returns a random deviate from the non-central F distribution where the degrees of freedoms are dfn (numerator) and dfd (denominator), and the non-centrality parameter is xnonc.
dfn
The degrees of freedom of the numerator
dfd
The degrees of freedom of the denominator
xnonc
The non-centrality parameter
A random deviate
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https://www.php.net/manual/en/function.stats-rand-gen-noncentral-f.php