Question 11 (Mandatory) (1 point) A survey of 15 large U.S. cities finds that the average commute time one way is 25.4 minutes. A chamber of commerce executive feels that the commute in his city is less and wants to publicize this. He randomly selects 25 commuters and finds the average is 22.1 minutes with a standard deviation of 5.3 minutes. What is the rejection region for this test at 0.10 significance level? OZs-1.645 Ots-1.318 Otz 1.7109 Ots 1.318 OZs-1.28 Question 12 (Mandatory) (1 point) A job placement director claims that the average starting salary for nurses is $24,000. A sample of 10 nurses' salaries has a mean of $23,450 and a standard deviation of $400. To test the claim at o#0.05 significance level, what is the observed value for the test statistic? O-1.645 O 1.6 O-1.375 O-4.35 4.35