A pizza delivery chain advertises that it will deliver your pizza in 30 minutes from when the order is placed. Being a skeptic, you decide to test and see if the mean delivery time is actually more than 30 minutes. For the simple random sample of 10 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 35.4 minutes with a standard deviation of 6.9 minutes. Assume that the population distribution is approximately normal. Perform a hypothesis test using a 0.05 level of significance.   Step 2 of 3 :

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