ESSENTIALS OF STATISTICS-W/APLIA
4th Edition
ISBN: 9781305611177
Author: HEALEY
Publisher: CENGAGE L
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Textbook Question
Chapter 4, Problem 4.12P
a.
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
| 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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Question 4
An article in Quality Progress (May 2011, pp. 42-48) describes the use of factorial experiments to improve a
silver powder production process. This product is used in conductive pastes to manufacture a wide variety of
products ranging from silicon wafers to elastic membrane switches. Powder density (g/cm²) and surface area
(cm/g) are the two critical characteristics of this product. The experiments involved three factors: reaction
temperature, ammonium percentage, stirring rate. Each of these factors had two levels, and the design was
replicated twice. The design is shown in Table 3.
A222222222222233
Stir Rate
(RPM)
Ammonium
(%)
Table 3: Silver Powder Experiment from Exercise 13.23
Temperature
(°C)
Density
Surface Area
100
8
14.68
0.40
100
8
15.18
0.43
30
100
8
15.12
0.42
30
100
17.48
0.41
150
7.54
0.69
150
8
6.66
0.67
30
150
8
12.46
0.52
30
150
8
12.62
0.36
100
40
10.95
0.58
100
40
17.68
0.43
30
100
40
12.65
0.57
30
100
40
15.96
0.54
150
40
8.03
0.68
150
40
8.84
0.75
30
150…
Chapter 4 Solutions
ESSENTIALS OF STATISTICS-W/APLIA
Ch. 4 - Compute the range and standard deviation of the...Ch. 4 - Compute the range and standard deviation of the...Ch. 4 - In problem 3.1 at the end of Chapter 3, you...Ch. 4 - SOC In problem 3.5 at the end of Chapter 3, you...Ch. 4 - SOC In problem 3.6, you computed mean and median...Ch. 4 - Compute the standard deviation for the pretest and...Ch. 4 - SOC Labor force participation rates percent...Ch. 4 - SOC Data on several variables measuring overall...Ch. 4 - SOC The price of a gallon of regular gas for 20...Ch. 4 - SOC In problem 3.11, you computed measures of...
Ch. 4 - Per capita expenditures for public transportation...Ch. 4 - a. PA Compute the range, interquartile range, and...Ch. 4 - SOC Listed here are the rates of abortion per...Ch. 4 - SW One of your goals as the new chief...Ch. 4 - You are the governor of the state and must decide...Ch. 4 - At St. Algebra College, the math department ran...Ch. 4 - Compute the standard deviation for both sets of...
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