6.3

You may need to use the appropriate appendix table or technology to answer this question. The increasing annual cost (including tuition, room, board, books, and fees) to attend college has been wide and public colleges. Data are in thousands of dollars. Private Colleges Public Colleges 53.8 44.2 44.0 34.3 43.0 20.3 22.0 28.2 15.6 24.1 28.5 30.6 46.8 37.8 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 collars) (b) (C) sample mean sample standard deviation Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand c sample mean sample standard deviation $:]........ ollars) y discussed (Timecam). The following random samples show the annual cost of attending private or private colleges. (Round the standard deviation to two decimal places.) or public colleges. (Round the standard deviation to two decimal places.) What is the point estimate (in thousand dollars) of the difference between the two population means? (Use Private Public.) Interpret this value in terms of 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 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.)