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Private Colleaes Public Colleaes sample mean sample standard deviation $ thousand thousand 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 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 $ thousand to $ thousand