How do you do a chi square test?

Answer 1

To perform a chi-square test, first, you need to set up a contingency table that displays the observed frequencies of different categories. Next, calculate the expected frequencies for each category based on the null hypothesis. Then, use the formula (\chi^2 = \sum \frac{(O - E)^2}{E}), where (O) is the observed frequency and (E) is the expected frequency, to compute the chi-square statistic. Finally, compare the calculated chi-square value to the critical value from the chi-square distribution table, based on your significance level and degrees of freedom, to determine whether to reject the null hypothesis.