The Federal Aviation Administration (FAA) would like to determine if the average number of minutes that a plane departs late differs between airports in Philadelphia, Orlando, and Chicago. The following data were collected from randomly selected flights and indicate the number of minutes that each plane was behind schedule at its departure. These data can also be found in the Excel file FAA.xlsx.

Philadelphia Orlando Chicago 12 8 33 0 19 10 27 0 41 34 10 51 12 13 30

a. Perform a one-way ANOVA using a = 0.05 to determine if there is a difference in the average lateness of the flights from these three airports.

b. If warranted, perform a multiple comparison test to determine which pairs are different using a = 0.05.

c. Verify your results with Excel or PHStat.

AppendixLO1