power-divergence statistics

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Statistics, used in goodness-of-fit tests, that have the form where fj is an observed frequency, ej is the corresponding expected frequency, and λ is a constant. The case λ=1 gives the chi-squared test statistic, the limiting case as λ approaches 0 gives the likelihood-ratio goodness-of-fit statistic, and the case λ=−½ gives the Freeman–Tukey test statistic.

Subjects: Probability and Statistics.

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