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MathPHP
Statistics
Significance
sem
MathPHP\Statistics\Significance::sem PHP Method
Significance Class Documentation
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Open project: markrogoyski/math-php
sem()
public
static
method
Used in the Z test. https://en.wikipedia.org/wiki/Standard_error σ SEM = -- √n
public
static
sem
(
number
$σ
,
integer
$n
) :
float
$σ
number
Population standard deviation
$n
integer
Sample size (number of observations of the sample)
return
float
public static function sem($σ, $n) { return $σ / sqrt($n); }
Significance
chiSquaredTest
sem
tScore
tTestOneSample
tTestTwoSample
zScore
zTest