# 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 27 Seattle 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

### Essentials Of Statistics

4th Edition
HEALEY + 1 other
Publisher: Cengage Learning,
ISBN: 9781305093836

### Essentials Of Statistics

4th Edition
HEALEY + 1 other
Publisher: Cengage Learning,
ISBN: 9781305093836

#### Solutions

Chapter
Section
Chapter 3, Problem 3.4P
Textbook Problem
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## 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-HoursLost 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 3027 Seattle 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

Expert Solution
To determine

a.

To Calculate:

The mean and median of the distribution.

### Explanation of Solution

The formula to calculate mean is given by,

X¯=i=1NXiN

The mean is given by,

X¯=i=1NXiN

Substitute 22 for N, 33 for X1, 28 for X2 and so on in the above mentioned formula,

X¯=33+28+...+27+4122=58422=26

Expert Solution
To determine

b.

To Compare:

The mean and median.

Expert Solution
To determine

c.

To Calculate:

The mean and median of the distribution after removing the data of the city Chicago.

Expert Solution
To determine

d.

To Report:

The mean and median in a research format

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