14. Inference review, problem 14 Aa Aa Suppose you are the owner of a chain of p

Question

14. Inference review, problem 14 Aa Aa Suppose you are the owner of a chain of pizza restaurants. You believe that the manager at the Champaign branch has a very irregular performance compared to the manager of the Urbana branch. You gather monthly data on profits for the Champaign branch of your restaurant (measured in dollars and cents). Given this information, which of the following tests would be most appropriate to use to test whether the volatility in profits is different between branches? O A z-test for difference in proportions O A t-test for the mean O An F-test for difference in variances O A z-test for the mean 0 A z-test for population proportion O An F-test for difference in means A paired sample t-test for difference in means O An independent samples t-test for difference in means (unequal variances) O A z-test for the difference in means A chi-squared test for variance O An independent samples t-test for difference in means (equal variances)

Explanation / Answer

Here we need to compare the volatility in two manager's performance and hence, we will apply the F - test for difference in variances.

Option 3 is correct.

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