Given a simple random sample of 20 speeds of cars on Highway 405 in California, you want

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Given a simple random sample of 20 speeds of cars on Highway 405 in California, you want to test the claim that the sample values are from a population with a mean greater than the posted speed limit of 65 mi h. Is it necessary to determine whether the sample is from a normally distributed population? If so, what methods can be used to make that determination?

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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