1. Suppose that the average trip time from New York to Tenesse by plane is is 158 minutes and that the standard deviation of the population is 87 minutes. We are interested to know whether the average trip time on the weekends is shorter. We study a sample of 50 trips on the weekends and the average is 143 minutes. Execute a hypothesis test at alpha= 5% that the average trip time on the weekends is shorter. What are Ho and Ha?
2. Findthe formula and the value for Z
3. What is the P-value?
4. What is the statistical as well as the plain English conclusion?
5. what value from the z-table should you use for dividing line. Show computation for all your work.
6. what is the correct formula for finding the probability of rejecting Ho if mu is actually 157
7. What is the actual probability of rejecting Ho if mu is 157