Hypothesis testing: must state the null and the alternate hypotheses in WORD first, then go through the process of hypothesis testing. Student also must state the findings (i.e., conclusion) in WORD.
You are the manger of a restaurant that delivers pizza to college dormitory rooms. You have just changed your delivery process in an effort to reduce mean time between the order and completion of delivery to 25 minutes, with a population standard deviation of 6 minutes.
A sample of 36 orders using the new delivery process yields a sample mean of 22.4 minutes.
At 0.05 level of significance, can you claim that the mean delivery time is 25 minutes?