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You’re a quality control engineer for Norman’s fourth largest cracker factory, and you plan to implement...

You’re a quality control engineer for Norman’s fourth largest cracker factory, and you plan to implement some process changes if you conclude that the mean weight of a 32 ounce box of saltine crackers is less than 32 ounces. Based on a sample of 15 boxes, you found an average and standard deviation of cracker box weight of 31.6 ounces and 1.2 ounces, respectively.

b. What is the probability that you conclude that no process changes are needed when the actual mean box weight is 31.7 ounces? Use the table in the textbook.

c. Redo part b, but instead use Excel

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