Name Rascal/Libraries/analysis/statistics/Inference/chiSquareTest

Synopsis Chi-square test on data values.

Function

1. num chiSquareTest(lrel[num expected, int observed] values)
2. bool chiSquareTest(lrel[num expected, int observed] values, real alpha)

Usage import analysis::statistics::Inference;

Description Perform a Chi-square test comparing expected and observed frequency counts. There are two forms of this test:

1. Returns the observed significance level, or p-value, associated with a Chi-square goodness of fit test comparing observed frequency counts to expected counts.
2. Performs a Chi-square goodness of fit test evaluating the null hypothesis that the observed counts conform to the frequency distribution described by the expected counts, with significance level alpha (0 < alpha < 0.5). Returns true iff the null hypothesis can be rejected with confidence 1 - alpha.

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