non-parametric statistics
- non-parametric statistics
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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