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/lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/Statistical/Distributions/ -> Fisher.php (source)

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Defines 1 class

Fisher:: (2 methods):
  distribution()
  inverse()


Class: Fisher  - X-Ref

distribution($value)   X-Ref
FISHER.

Returns the Fisher transformation at x. This transformation produces a function that
is normally distributed rather than skewed. Use this function to perform hypothesis
testing on the correlation coefficient.

return: float|string
param: mixed $value Float value for which we want the probability

inverse($probability)   X-Ref
FISHERINV.

Returns the inverse of the Fisher transformation. Use this transformation when
analyzing correlations between ranges or arrays of data. If y = FISHER(x), then
FISHERINV(y) = x.

return: float|string
param: mixed $probability Float probability at which you want to evaluate the distribution