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3. A study found that highway drivers in one state traveled at an average speed of 53.7 miles per hour (MPH). Assume the population standard

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3. A study found that highway drivers in one state traveled at an average speed of 53.7 miles per hour (MPH). Assume the population standard deviation is 5.1 MPH. Complete parts a through d below. a. What is the probability that a sample of 30 of the drivers will have a sample mean less than 52 MPH? P (x

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