(PECL stats >= 1.0.0)
stats_rand_gen_noncentral_t — Generates a single random deviate from a non-central t-distribution
stats_rand_gen_noncentral_t ( float $df , float $xnonc ) : float
Returns a random deviate from the non-central t-distribution with the degrees of freedom, df, and the non-centrality parameter, xnonc.
df
The degrees of freedom
xnonc
The non-centrality parameter
A random deviate
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https://www.php.net/manual/en/function.stats-rand-gen-noncentral-t.php