Dictionary of Human Evolution and Biology

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Nonparametric Test

Any statistical method that does not involve population parameters, or that is only concerned with the form of a population frequency distribution. Such procedures are useful for testing hypotheses involving one or more variables measured on a nominal or ordinal scale, or using interval or ratio data when assumptions associated with parametric procedures are not met. Examples are the chi-square test and contingency table analysis. Aka distributionfree procedure, nonparametric procedure.

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