stats_dens_t

(PECL stats >= 1.0.0)

stats_dens_tProbability density function of the t-distribution

说明

stats_dens_t ( float $x , float $dfr ) : float

Returns the probability density at x, where the random variable follows the t-distribution of which the degree of freedom is dfr.

参数

x

The value at which the probability density is calculated

dfr

The degree of freedom of the distribution

返回值

The probability density at x or FALSE for failure.

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