You may need to use the appropriate appendix table or technology to answer this question. A government agency provides t

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You May Need To Use The Appropriate Appendix Table Or Technology To Answer This Question A Government Agency Provides T 1 (111.83 KiB) Viewed 25 times

You may need to use the appropriate appendix table or technology to answer this question. A government agency provides the number of miles that residents of the 75 largest metropolitan areas travel per day in a car. Suppose that for a simple random sample of 50 City A residents the mean is 22.8 miles a day and the standard deviation is 8.7 miles a day, and for an independent simple random sample of 40 City B residents the mean is 18.5 miles a day and the standard deviation is 7.7 miles a day. (a) What is the point estimate of the difference between the mean number of miles that City A residents travel per day and the mean number of miles that City B residents travel per day? (Use City A - City B.) mi/day (b) What is the 95% confidence interval for the difference between the two population means in miles per day)? (Use City A - City B. Round your answers to one decimal place.) mi/day to mi/day Need Help? Watch It Submit Answer 6. [-70.76 Points] DETAILS ASWSBE13 10.E.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHE You may need to use the appropriate appendix table or technology to answer this question. The average annual cost (including tuition, room, board, books, and fees) to attend a public college takes nearly a third of the annual income of a typical family with college-age children. At private colleges, the average annual cost is equal to about 60% of the typical family's income. The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Private Colleges Public Colleges 53.8 42.2 45.0 32.3 45.0 20.3 22.0 28.2 15.6 24.1 28.5 30.6 44.8 38.8 51.5 43.0 22.8 25.8 18.5 25.6 14.4 21.8 (a) Compute the sample mean (in thousand dollars) and sample standard deviation in thousand dollars) for private colleges. (Round the standard deviation to two decimal places.) sample mean thousand sample standard deviation $ thousand Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for public colleges. (Round the standard deviation to two decimal places.) sample mean $ thousand sample standard deviation thousand $ (b) What is the point estimate (in thousand dollars) of the difference between the two population means? (Use Private - Public.) thousand Interpret this value in terms the annual cost (in dollars) of attending private and public colleges. We estimate that the mean annual cost to attend private colleges is $ more than the mean annual cost to attend public college (c) Develop a 95% confidence interval (in thousand dollars) of the difference between the mean annual cost of attending private and public colleges. (Use Private - Public. Round your answers to one decimal place.) $ thousand to $ thousand