Does the cost of a plane flight depend on the airline as well as the distance traveled? In Exercise 12.21, you explored the first part of this problem. The data shown in this table compare the average cost and distance traveled for two different airlines, measured for 11 heavily traveled air routes in the United States.

Use a computer package to analyze the data with a multiple regression analysis. Comment on the fit of the model, the significant variables, any interactions that exist, and any regression assumptions that may have been violated. Summarize your results in a report, including printouts and graphs if possible.

Transcribed Image Text:

Route Distance Cost Airline Chicago-Detroit 238 148 American 164 United Chicago-Denver 901 256 American 312 United Chicago-St. Louis 262 136 American 152 United 1736 424 Chicago-Seattle American 520 United American United American United Chicago-Cleveland 301 129 139 1757 Los Angeles-Chicago 361 473 Chicago-Atlanta 593 162 American 183 United New York-Los Angeles 2463 444 American 525 United New York-Chicago 714 287 American 334 United 2556 323 Los Angeles-Honolulu American 333 United 2574 New York-San Francisco 513 American 672 United