stats_dens_pmf_negative_binomial
(PECL stats >= 1.0.0)
stats_dens_pmf_negative_binomial — Probability mass function of the negative binomial distribution
Описание
stats_dens_pmf_negative_binomial
( float
$x
, float $n
, float $pi
) : float
Returns the probability mass at x, where the
random variable follows the negative binomial distribution of which
the number of the success is n and the success
rate is pi.
Список параметров
-
x -
The value at which the probability mass is calculated
-
n -
The number of the success of the distribution
-
pi -
The success rate of the distribution
Возвращаемые значения
The probability mass at x or false for failure.