Chi-square test

A chi-square test is any statistical hypothesis test in which the test statistic has a chi-square distribution if the null hypothesis is true.

These include:

• Pearson's chi-square test
• Some likelihood-ratio tests are approximately chi-square tests when the sample-size is large. They are widely used in logistic regression. Other likelihood-ratio tests cannot be regarded as even approximately chi-square tests; e.g., F-tests in the analysis of variance and t-tests are likelihood-ratio tests, but the test statistic does not have a chi-square distribution under the null hypothesis.
• Yates' chi-square test, or Yates' correction for continuity
• Mantel-Haenszel chi-square test[?]
• linear by linear association chi-square test[?]

[still a stub -- please add tests, history, etc.]