The following table presents the annual personhours of time lost due to traffic congestion for a group of cities for 2007. This statistic is a measure of traffic congestion PA Annual Person-Hours of Time Lost to Traffic Congestion per City Year per Person Baltimore 25 Boston 22 Buffalo 5 Chicago 22 Cleveland 7 Dallas 32 Detroit 29 Houston 32 Kansas City 8 Los Angeles 38 Miami 27 Minneapolis 22 New Orleans 10 New York 21 Philadelphia 21 Pittsburgh 8 Phoenix 23 San Antonio 21 Annual Person-Hours of Time Lost to Traffic Congestion per City Year per Person San Diego 29 San Francisco 29 Seattle 24 Washington, DC 31 Source: U.S. Bureau of the Census. 2009. Statistical Abstract of the United States: 2009. Table 1063. Available at http://www.

census.gov/prod/2009pubs/10statab/trans.pdfhttp://www.

census.gov/compendia/statab/.

a. Calculate the mean and median of this distribution.

b. Compare the mean and median. Which is the higher value? Why?

c. If you removed Los Angeles from this distribution and recalculated, what would happen to the mean?

To the median? Why?

d. Report the mean and median as you would in a formal research report.