Discussion #3

3. A new bus route has been established between downtown Denver and Englewood (a suburb of Denver). Dan has taken the bus to work for many years. For the old bus route, he knows from long experience that the mean waiting time between buses at his stop was M = 20 minutes. However, a random sample ofve waiting times between buses using the new route had mean :7: = 15.1 minutes with sample standard deviation, 5 = 6.2 minutes. Does this indicate that the population mean waiting time for the new route is different than what it used to be? Use a = 0.05. Assume thatx is normally distributed. (Hint: Use "TTest" to nd the p- value.) a. State the null and alternative hypothesis b. Give the p-value for this hypothesis test c. State your decision about the null hypothesis and your conclusion for this hypothesis test using the correct terminology