4th Edition

ISBN: 9781305093836

Author: HEALEY, Joseph F.

Publisher: Cengage Learning,

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Textbook Question

Chapter 4, Problem 4.12P

a. P A Compute the range, interquartile range, and standard deviation for the data presented in problem 3.4. The data are reproduced here. (NOTE: To simplify computations for Q , round off the case numbers that mark the first and third quartiles to the nearest whole number.)

b. What would happen to the value of the standard deviation if you removed Chicago (the city with the highest score) from this distribution and recalculated? Why?

City	Annual Person – Hours Lost to Traffic Congestion
Baltimore	33
Boston	28
Buffalo	11
Chicago	44
Cleveland	13
Dallas	32
Detroit	23
Houston	37
Kansas City	14
Los Angeles	40
Miami	26
Minneapolis	27
New Orleans	20
New York	24
Philadelphia	26
Phoenix	23
Pittsburgh	23
San Antonio	19
San Diego	23
San Francisco	30
Seattle	27
Washington, D.C.	41

Source: U.S. Bureau of the Census. 2012. Statistical Abstract of the United States: 2012. Table 1099. Available at http://www.census.gov/prod/2011pubs/12statab/trans.pdf

3.4 P A The following table presents the annual person hours of time lost due to traffic congestion for a group of cities for 2009. This statistic is a measure of traffic congestion.

City	Annual Person – Hours Lost to Traffic Congestion
Baltimore	33
Boston	28
Buffalo	11
Chicago	44
Cleveland	13
Dallas	32
Detroit	23
Houston	37
Kansas City	14
Los Angeles	40
Miami	26
Minneapolis	27
New Orleans	20
New York	24
Philadelphia	26
Phoenix	23
Pittsburgh	23
San Antonio	19
San Diego	23
San Francisco	30
Seattle	27
Washington, D.C.	41

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Chapter 4, Problem 4.11P

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