PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions\ChiSquared Class Reference

Static Public Member Functions
static	distributionLeftTail (mixed $value, mixed $degrees, mixed $cumulative)
	CHIDIST.
static	distributionRightTail (mixed $value, mixed $degrees)
static	inverseLeftTail (mixed $probability, mixed $degrees)
	CHIINV.
static	inverseRightTail (mixed $probability, mixed $degrees)
	CHIINV.
static	test (mixed $actual, mixed $expected)
	CHITEST.

Static Protected Member Functions
static	degrees (int $rows, int $columns)

Member Function Documentation

distributionLeftTail()

static PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions\ChiSquared::distributionLeftTail ( mixed $value, mixed $degrees, mixed $cumulative )

static

CHIDIST.

Returns the one-tailed probability of the chi-squared distribution.

Parameters

mixed	$value	Float value for which we want the probability Or can be an array of values
mixed	$degrees	Integer degrees of freedom Or can be an array of values
mixed	$cumulative	Boolean value indicating if we want the cdf (true) or the pdf (false) Or can be an array of values

Return values

array|float|int|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

inverseLeftTail()

static PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions\ChiSquared::inverseLeftTail ( mixed $probability, mixed $degrees )

static

CHIINV.

Returns the inverse of the left-tailed probability of the chi-squared distribution.

Parameters

mixed	$probability	Float probability at which you want to evaluate the distribution Or can be an array of values
mixed	$degrees	Integer degrees of freedom Or can be an array of values

Return values

array|float|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

inverseRightTail()

static PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions\ChiSquared::inverseRightTail ( mixed $probability, mixed $degrees )

static

CHIINV.

Returns the inverse of the right-tailed probability of the chi-squared distribution.

Parameters

mixed	$probability	Float probability at which you want to evaluate the distribution Or can be an array of values
mixed	$degrees	Integer degrees of freedom Or can be an array of values

Return values

array|float|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

test()

static PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions\ChiSquared::test ( mixed $actual, mixed $expected )

static

CHITEST.

Uses the chi-square test to calculate the probability that the differences between two supplied data sets (of observed and expected frequencies), are likely to be simply due to sampling error, or if they are likely to be real.

Parameters

mixed	$actual	an array of observed frequencies
mixed	$expected	an array of expected frequencies

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The documentation for this class was generated from the following file:

• lib/phpspreadsheet/phpspreadsheet/src/PhpSpreadsheet/Calculation/Statistical/Distributions/ChiSquared.php