stats_dens_pmf_binomial
(PECL stats >= 1.0.0)
stats_dens_pmf_binomial — Probability mass function of the binomial distribution
说明
stats_dens_pmf_binomial
( float
$x
, float $n
, float $pi
) : float
Returns the probability mass at x, where the random variable
follows the binomial distribution of which the number of trials is n
and the success rate is pi.
参数
-
x -
The value at which the probability mass is calculated
-
n -
The number of trials of the distribution
-
pi -
The success rate of the distribution
返回值
The probability mass at x or FALSE for failure.