[Chapter 9] Hypothesis Test Suppose you are the owner of a pizzeria that delivers pizza to college dormitory rooms. You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A random sample of 36 orders using the new delivery process yields a mean of 22.4 minutes and a standard deviation of 6 minutes. Is there evidence that the mean delivery time has been reduced? Conduct a hypothesis test at the 0.05 level of significance. Question 17 (1 point) The appropriate set of hypotheses is OHo: M > 25 Haius 25 OHo: M = 25 Hail$ 25 OHo: MS 25 Hai M > 25 Ho: M 2 25 Hail