Airline Travelers often choose which airport to fly from based on flight cost. Cost data (in dollars) for a sample of flights to eight cities from Dayton, Ohio, and Louisville, Kentucky, were collected to help determine which of the two airports was more costly to fly from. A researcher argued that it is significantly more costly to fly out of Dayton than Louisville. Use the sample data to see whether they support the researcher's argument. Use a=.05 as the level of significance.
Destination Dayton Louisville
Chicago-O'Hare 319 142
Grand Rapids, Michigan 192 213
Portland, Oregon 503 317
Atlanta 256 387
Seattle 339 317
South Bend, Indiana 379 167
Miami 268 273
Dallas-Ft.Worth 288 274