You are the manager of a restaurant that delivers pizzas to college dormitory rooms. On average it takes 25 minutes to deliver an order. You have recently hired an operations expert to try to decrease the delivery time. From past experience, the standard deviation ? is known to be 6 minutes. You randomly sample 36 orders using the new delivery system and find an average of 22.4 minutes. You will test at the 5% significance level. Suppose that the mean

Given: H = 25, 0 = 6 n = 36, x = 22.4 Null hypothesis: Ho: H = 25 Alternate hypothesis: H1: p