6.33

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. (a) (b) (C) Private Colleges Public Colleges 53.8 44.2 44.0 34.3 43.0 v discussed (Time.com). The following random samples show the annual cost of attending private 30.6 46.8 37.8 51.5 43.0 Compute the sample mean (in thousand dol samp e mean samp e standard deviation samp e mean samp e standard deviation $ 42.90 J thousand _ hhouodnd Compute the sample mean (in thousand dol $ 22.30 J thousand d_ hhouodnd ars) and sample standard deviation (in thousand c 20.3 22.0 28.2 15.6 24.1 28.5 22.8 25.8 18.5 25.6 14.4 21.8 ars) and sample standard deviation (in thousand collars) ol la rs) 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.) _ hhousdnd 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 $ 20.60 X 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.) dx hhouodnduodx hhousnnd