An analyst is to conduct a study to compare the average annual salary of financial managers in 2021 () and the average annual salary of accountants in 2021 (2), both with over 5 years of experience. It is expected that < M2. In addition to the random sample of annual salaries of managers in 2021 mentioned above, another random sample of 42 annual salaries of accountants in 2021 is selected. The mean and standard deviation of this sample are found to be 41,050 EUR and 560 EUR respectively. The analyst is to perform a t-test to test whether the expectation is met. But she has no information on the two population variances. So she first performs an F-test at a significance level of 5% to determine if the two population variances are equal, assuming that both populations are normal. Question 10: In the F-test, what is the test statistic? Question 11: Find the rejection region in the F-test. Question 12: What are the conclusions? Question 13: The analyst then performs an appropriate t-test at a significance level of 5% to test the claim M. What is the test statistic? Question 14: What is the rejection region in the t-test? Question 15: What are the conclusions?