PHP Класс MathPHP\Probability\Distribution\Continuous\F

Наследование: extends Continuous

Открытые методы

Метод	Описание
CDF ( number $x, integer $d₁, integer $d₂ ) : number	Cumulative distribution function
PDF ( number $x, integer $d₁, integer $d₂ ) : number	Probability density function
mean ( integer $d₁, integer $d₂ ) : number	Mean of the distribution

d₁ d₂ \ I | --, -- | ᵈ¹ˣ \ 2 2 / ------ ᵈ¹ˣ⁺ᵈ² Where I is the regularized incomplete beta function.

public static CDF ( number $x, integer $d₁, integer $d₂ ) : number
$x	number	percentile ≥ 0
$d₁	integer	degree of freedom v1 > 0
$d₂	integer	degree of freedom v2 > 0
Результат	number

__________________ (d₁ x)ᵈ¹ d₂ᵈ² ---------------- √ (d₁ x + d₂)ᵈ¹⁺ᵈ² --------------------- d₁ d₂ \ x B | --, -- | \ 2 2 /

public static PDF ( number $x, integer $d₁, integer $d₂ ) : number
$x	number	percentile ≥ 0
$d₁	integer	degree of freedom v1 > 0
$d₂	integer	degree of freedom v2 > 0
Результат	number	probability

d₂ μ = ------ for d₂ > 2 d₂ - 2

public static mean ( integer $d₁, integer $d₂ ) : number
$d₁	integer	degree of freedom v1 > 0
$d₂	integer	degree of freedom v2 > 0
Результат	number