stats_dens_pmf_hypergeometric

(PECL stats >= 1.0.0)

stats_dens_pmf_hypergeometric — Probability mass function of the hypergeometric distribution

说明

stats_dens_pmf_hypergeometric ( float $n1 , float $n2 , float $N1 , float $N2 ) : float

Returns the probability mass at n1, where the random variable follows the hypergeometric distribution of which the number of failure is n2, the number of success samples is N1, and the number of failure samples is N2.

参数

n1

The number of success, at which the probability mass is calculated

n2

The number of failure of the distribution

N1

The number of success samples of the distribution

N2

The number of failure samples of the distribution

返回值

The probability mass at n1 or FALSE for failure.

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