stats_dens_pmf_binomial

(PECL stats >= 1.0.0)

stats_dens_pmf_binomial — Probability mass function of the binomial distribution

说明

float stats_dens_pmf_binomial ( float $x , float $n , float $pi )

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.