Probability density function of the t-distribution

# stats_dens_t

(PECL stats >= 1.0.0)

stats_dens_t — Probability density function of the t-distribution

### 说明

function 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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