romaine6913 romaine6913

25-05-2023
Mathematics

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The number of hours of sleep each night for American adults is assumed to be normal with a mean of 6.8 hours and a standard deviation of 0.9 hours. Use this information to answer the next 3 parts. Part 3: Find the probability that a random sample of 9 Americans will have a mean of more than 7.2 hours of sleep per night.

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