Hotel Costs Refer to Exercise 8.20. Themeans and standard
Chapter 8, Problem 51(choose chapter or problem)
Hotel Costs Refer to Exercise 8.20. Themeans and standard deviations for 50 billing statementsfrom each of the computer databases of each ofthe three hotel chains are given in the table:4Marriott Westin DoubletreeSample Average ($) 150 165 125Sample Standard Deviation 17.2 22.5 12.8 a. Find a 95% confidence interval for the difference inthe average room rates for the Marriott and theWestin hotel chains.b. Find a 99% confidence interval for the difference inthe average room rates for the Westin and the Doubletreehotel chains.c. Do the intervals in parts a and b contain the value(m1 m2) 0? Why is this of interest to theresearcher?d. Do the data indicate a difference in the averageroom rates between the Marriott and the Westinchains? Between the Westin and the Doubletreechains?
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