PHP 클래스 MathPHP\Probability\Distribution\Continuous\ChiSquared

상속: extends Continuous

공개 메소드들

메소드	설명
CDF ( number $x, integer $k ) : number	Cumulative distribution function
PDF ( number $x, integer $k ) : number	Probability density function
mean ( integer $k ) : integer	Mean of the distribution

Cumulative t value up to a point, left tail. k x \ γ | - , - | \ 2 2 / CDF = ------------- k \ Γ | - | \ 2 /

public static CDF ( number $x, integer $k ) : number
$x	number	Chi-square critical value (CV) > 0
$k	integer	degrees of freedom > 0
리턴	number	cumulative probability

1 -------------- x⁽ᵏ/²⁾⁻¹ ℯ⁻⁽ˣ/²⁾ χ²(k) = / k \ 2ᵏ/² Γ | - | \ 2 /

public static PDF ( number $x, integer $k ) : number
$x	number	point at which to evaluate > 0
$k	integer	degrees of freedom > 0
리턴	number	probability

μ = k

public static mean ( integer $k ) : integer
$k	integer	degrees of freedom > 0
리턴	integer	k