PHP - Manual: stats_dens_chisquare
2025-02-27
(PECL stats >= 1.0.0)
stats_dens_chisquare — Probability density function of the chi-square distribution
Returns the probability density at x
, where the
random variable follows the chi-square distribution of which the degree of
freedom is dfr
.
x
The value at which the probability density is calculated
dfr
The degree of freedom of the distribution
The probability density at x
or false
for failure.
官方地址:https://www.php.net/manual/en/function.stats-dens-chisquare.php