[EX02-073] One measure of airline performance is overall flight on-time rates. For January 2005, the on-time arrival rates of domestic flights at the 31 largest U.S. airports were as follows.

ATL 69.09 BWI 74.01 BOS 62.14

••• Remainder of data on Student’s Suite CD-ROM Source: U.S. Department of Transportation, Bureau of Transportation Statistics

a. Find the mean on-time arrival rate for January 2005.

b. Find the median on-time arrival rate for January 2005.

c. Construct a stem-and-leaf display of the data.

d. Describe the relationship between the mean and the median and what properties of the data cause the mean to be lower than the median.

(Retain these solutions to use in Exercise 2.99 on p. 92.)