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Nationally, the average commule time Is 27 minutes with a standard deviation of 20 minutes. Every day, here are 220 million vehicle miles travelled in

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Nationally, the average commule time Is 27 minutes with a standard deviation of 20 minutes. Every day, here are 220 million vehicle miles travelled in LA County. A sample of 30 commuters from LA County had an average commute limo of 48 minutes. What is the probability that random sampling and chance alone produced a sample with an average commute time this long in this geographical area

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