If we want to use the chi-square test to test the difference between two proportions, we should
A) convert the proportions to means.
B) convert the proportions to frequencies.
C) run a z test.
D) either b or c

Question

Quizplus · Accepted Answer

To use the chi-square test to test the difference between two proportions, we need to convert the proportions to frequencies (option B) and then use the chi-square test for goodness of fit. However, we could also run a z test (option C) if the sample sizes are large enough and the proportion of successes and failures in both groups are reasonably close to 0.5. Therefore, either option B or C would be appropriate for testing the difference between two proportions using the chi-square test.

If We Want to Use the Chi-Square Test to Test