Chapter 12.2, Problem 11E

A Bloomberg Businessweek subscriber study asked, “In the past 12 months, when travelling for business, what type of airline ticket did you purchase most often?” A second question asked if the type of airline ticket purchased most often was for domestic or international travel. Sample data obtained are shown in the following table.

Type of Flight
Type of Ticket	Domestic	International
First class	29	22
Business class	95	121
Economy class	518	135