stats_dens_normal
(PECL stats >= 1.0.0)
stats_dens_normal — Probability density function of the normal distribution
说明
stats_dens_normal
( float
$x
, float $ave
, float $stdev
) : float
Returns the probability density at x, where the
random variable follows the normal distribution of which the mean is
ave and the standard deviation is
stdev.
参数
-
x -
The value at which the probability density is calculated
-
ave -
The mean of the distribution
-
stdev -
The standard deviation of the distribution
返回值
The probability density at x or FALSE for failure.