(PECL stats >= 1.0.0)
stats_dens_pmf_negative_binomial — Probability density function of the negative binomial distribution
$x
, float $n
, float $pi
) : float
Returns the probability density 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
.
x
The value at which the probability density is calculated
n
The number of the success of the distribution
pi
The success rate of the distribution
The probability density at x
or FALSE
for failure.