## Question

###### The U.S. Department of Transportation provides the number of miles that residents of the 75 largest metropolitan areas travel per day in a car_ Suppose that for a random sample of 60 Buffalo residents the mean is 22.5 miles a day and the standard deviation is 8.8 miles a day, and for an independent random sample of 30 Boston residents the mean is 18.8 miles day and the standard deviation is 7.2 miles a day_ Round your answers to one decimal place.a. What is the point estimate of the difference b

The U.S. Department of Transportation provides the number of miles that residents of the 75 largest metropolitan areas travel per day in a car_ Suppose that for a random sample of 60 Buffalo residents the mean is 22.5 miles a day and the standard deviation is 8.8 miles a day, and for an independent random sample of 30 Boston residents the mean is 18.8 miles day and the standard deviation is 7.2 miles a day_ Round your answers to one decimal place. a. What is the point estimate of the difference between the mean number of miles that Buffalo residents travel per day and the mean number of miles that Boston residents travel per day? What is the 95% confidence interval for the difference between the two population means?

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