- A branch of statistical inference which makes no assumptions about the underlying distributional form of variables . While parametric statistics are based upon an ideal hypothetical mathematical form for the data (usually the normal distribution ), some statisticians claim that for social science data the assumptions required to do this are hardly ever justified, and consequently that it is always preferable to use non-parametric statistics (see, for example,, Practical Nonparametric Statistics, 1980). A well-known example, equivalent to the parametric t-test, is the Mann-Whitney U-test.
Dictionary of sociology. 2013.
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Non-parametric statistics — In statistics, the term non parametric statistics has at least two different meanings: The first meaning of non parametric covers techniques that do not rely on data belonging to any particular distribution. These include, among others:… … Wikipedia
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parametric statistics — A branch of statistical inference which makes assumptions about the underlying mathematical distributional form of observed variables. The most familiar of these hypothetical mathematical distributions is the normal distribution . Binomial and… … Dictionary of sociology
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nonparametric statistics — non parametric statistics … Dictionary of sociology
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