The same formula is used to calculate the chi-square statistic in the chi-square test for goodness-of-fit and the chi-square test of independence.Which calculation differs along the way for these two tests?
A) observed frequencies
B) expected frequencies
C) difference between observed and expected frequencies
D) sample size

Question

Quizplus · Accepted Answer

In the chi-square test for goodness-of-fit, expected frequencies are calculated based on the null hypothesis that the sample comes from a population with specific proportions. In the chi-square test of independence, expected frequencies are calculated based on the assumption that two variables are independent, using the product of the marginal totals divided by the grand total.

The Same Formula Is Used to Calculate the Chi-Square Statistic