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# Nonparametric Statistics

A statistical method wherein the data is not required to fit a normal distribution. Nonparametric statistics uses data that is often ordinal, meaning it does not rely on numbers, but rather a ranking or order of sorts. For example, a survey conveying consumer preferences ranging from like to dislike would be considered ordinal data.

Nonparametric statistics have gained appreciation due to their ease of use. As the need for parameters is relieved, the data becomes more applicable to a larger variety of tests. This type of statistics can be used without the mean, sample size, standard deviation, or the estimation of any other related parameters when none of that information is available.

Investment dictionary. . 2012.

### Look at other dictionaries:

• nonparametric statistics — noun the branch of statistics dealing with variables without making assumptions about the form or the parameters of their distribution • Hypernyms: ↑statistics …   Useful english dictionary

• nonparametric statistics — non parametric statistics …   Dictionary of sociology

• nonparametric statistics — a statistical methodology that can be used on data without making the assumption that the data are drawn from a population with a normal or other specified distribution. See also under test …   Medical dictionary

• statistics — /steuh tis tiks/, n. 1. (used with a sing. v.) the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability, imposes order and… …   Universalium

• nonparametric test — a statistical test using nonparametric statistics, such as the rank sum test or signed rank test; nonparametric tests are often less powerful than parametric tests but are valid in cases where parametric tests are not …   Medical dictionary

• statistics — See cluster analysis ; contingency table ; dissimilarity, index of ; Gini coefficient ; hazard model ; inferential statistics ; logistic (or logit) regression ; loglinear analysis ; Lorenz curve ; measurement ; …   Dictionary of sociology

• Nonparametric regression — is a form of regression analysis in which the predictor does not take a predetermined form but is constructed according to information derived from the data. Nonparametric regression requires larger sample sizes than regression based on… …   Wikipedia

• Nonparametric Method — A method commonly used in statistics to model and analyze ordinal or nominal data with small sample sizes. Unlike parametric models, nonparametric models do not require the modeler to make any assumptions about the distribution of the population …   Investment dictionary

• nonparametric — adjective not involving an estimation of the parameters of a statistic • Pertains to noun: ↑nonparametric statistic • Topics: ↑statistics …   Useful english dictionary

• nonparametric — /non par euh me trik/, adj. Statistics. (of a test or method) not requiring assertions about parameters or about the form of the underlying distribution. [1940 45; NON + PARAMETRIC] * * * …   Universalium