The Chi-Square ($\chi^2$) test is a statistical hypothesis test used to determine if there is a significant association between categorical variables. Unlike t-tests or ANOVA, which deal with means and continuous data, the Chi-Square test deals with frequencies and counts.
chi squared equals sum of the fraction with numerator open paren cap O minus cap E close paren squared and denominator cap E end-fraction = Observed Frequency = Expected Frequency The Pennsylvania State University Example 1: Goodness of Fit (One-Way Test) chi-square test example problems with answers ppt