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Sylvia, a manager of a pizzeria wants to optimize the average delivery time of orders from...
A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. Over the course of a few months, the customer orders 29 pizzas and records the delivery times. The average delivery time is 20.3 with a standard deviation of 8.694. If the customer estimates the time using a 95% confidence interval, what is the margin of error? Question 1 options: 1) 3.3019 2) 2.7464 3) 1.6144 4) 3.307 5) 0.7836
Question 1 (1 point) A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. Over the course of a few months, the customer orders 29 pizzas and records the delivery times. The average delivery time is 23.69 with a standard deviation of 7.212. If the customer estimates the time using a 95% confidence interval, what is the margin of error? Question 1 options: 1) 0.7137 2) 2.2782 3) 2.7433 4) 1.3392 5) 2.739...
Walzon recently made changes to its inventory management and delivery systems. Walzon wants to know whether these changes have reduced mean delivery time (number of hours from placing an order to receiving the item). Walzon wants to test the null hypothesis that mean delivery time is at least 37 hours against the alternative hypothesis that mean delivery time is less than 37 hours. Assume that delivery times are approximately normally distributed, with a known standard deviation of 8 hours. A...
A local pizza place claims that they average a delivery time of 10.14 minutes. To test this claim, you order 13 pizzas over the next month at random times on random days of the week. You calculate that the average delivery time is 8.59 minutes with a standard deviation of 1.721 minutes. You create a 99% confidence interval of (7.13, 10.05). Of those listed below, what is the best conclusion you can make? Question 7 options: 1) The percentage of...
A courier service advertises that its average delivery time is less than 3 hours for deliveries in the Vancouver area. The distribution of delivery times is known to be normal, with standard deviation 0.9 hours. A random sample of 15 deliveries yielded a sample mean delivery time of 3.2 hours. Consider a test of the null hypothesis that the population mean is 3 against the one-sided alternative that the population mean delivery time is greater than 3. (a) What is...
Question 41 2 pts A software company is developing a new computer game. The manager wants to know what effect the frequency at which opponents are released by the computer has on the length of time players survive in the game. A large group of playtesters is available, most of whom already have some experience playing the new game, and each is randomly allocated to play the game with a different opponent release frequency Data was collected for the variables...