The Sacred Grounds coffee shop in Deadhorse, AK, is considering replacing its coffee brewing units with new German brewers. You have been assigned to investigate this proposal. Develop a 99% confidence intervalfor the average yield (cups per pound) for the new German coffee brewer. The margin of error should be no bigger than .3 (three-tenths of a cup). Based on experience with the current system, your best guess for the population standard deviationis 1.2 cups. How big a sample do you need?
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