(PECL stats >= 1.0.0)
stats_dens_t — Probability density function of the t-distribution
stats_dens_t(float $x, float $dfr): float
Returns the probability density at x, where the random variable follows the t-distribution of which the degree of freedom is dfr.
xThe value at which the probability density is calculated
dfrThe degree of freedom of the distribution
The probability density at x or false for failure.
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https://www.php.net/manual/en/function.stats-dens-t.php