The chi-squared test, often written as χ2 test, is a statistical hypothesis test used in the analysis of categorical variables to determine whether observed data are different from expectations. In ...

This applet allows users to conduct a chi-square test using a dataset displayed in a contingency table. Simulated results show the resulting sampling distribution of the chi-square test statistics.

The classical chi-square test for independence in a two-way contingency table often rejects the independence hypothesis at an extremely small significance level, particularly when the sample size is ...

For a 2 ×2 table, the Pearson chi-square is also appropriate for testing the equality of two binomial proportions or, for R ×2 and 2 ×C tables, the homogeneity of proportions. Refer to Fienberg (1980) ...