# chi-square test

- a test devised by Karl Pearson that uses the quantity chi-square for testing the mathematical fit of a frequency curve to an observed frequency distribution.

Also chi-squared test [kahy-skwaird] /ˈkaɪˌskwɛərd/.

## Origin of chi-square test^{}

First recorded in 1935–40

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# chi-square test

- statistics a test derived from the chi-square distribution to compare the goodness of fit of theoretical and observed frequency distributions or to compare nominal data derived from unmatched groups of subjects

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# chi-square test

- A test that uses the chi-square statistic to test the fit between a theoretical frequency distribution and a frequency distribution of observed data for which each observation may fall into one of several classes.

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