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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.