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Differences Between: [Versions 400 and 403] [Versions 401 and 403]
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| File Size: | 335 lines (11 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
ChiSquared:: (11 methods):
distributionRightTail()
distributionLeftTail()
inverseRightTail()
inverseLeftTail()
test()
degrees()
inverseLeftTailCalculation()
pchisq()
gammp()
gser()
gcf()
Class: ChiSquared - X-Ref
| distributionRightTail($value, $degrees) X-Ref |
| CHIDIST. Returns the one-tailed probability of the chi-squared distribution. param: mixed $value Float value for which we want the probability param: mixed $degrees Integer degrees of freedom return: array|float|string |
| distributionLeftTail($value, $degrees, $cumulative) X-Ref |
| CHIDIST. Returns the one-tailed probability of the chi-squared distribution. param: mixed $value Float value for which we want the probability param: mixed $degrees Integer degrees of freedom param: mixed $cumulative Boolean value indicating if we want the cdf (true) or the pdf (false) return: array|float|string |
| inverseRightTail($probability, $degrees) X-Ref |
| CHIINV. Returns the inverse of the right-tailed probability of the chi-squared distribution. param: mixed $probability Float probability at which you want to evaluate the distribution param: mixed $degrees Integer degrees of freedom return: array|float|string |
| inverseLeftTail($probability, $degrees) X-Ref |
| CHIINV. Returns the inverse of the left-tailed probability of the chi-squared distribution. param: mixed $probability Float probability at which you want to evaluate the distribution param: mixed $degrees Integer degrees of freedom return: array|float|string |
| test($actual, $expected) X-Ref |
| 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. param: mixed $actual an array of observed frequencies param: mixed $expected an array of expected frequencies return: float|string |
| degrees(int $rows, int $columns) X-Ref |
| No description |
| inverseLeftTailCalculation(float $probability, int $degrees) X-Ref |
| No description |
| pchisq(float $chi2, int $degrees) X-Ref |
| No description |
| gammp(int $n, float $x) X-Ref |
| No description |
| gser(int $n, float $x) X-Ref |
| No description |
| gcf(int $n, float $x) X-Ref |
| No description |
