Bundle: Modern Business Statistics with Microsoft Office Excel, Loose-Leaf Version, 6th + MindTap Business Statistics, 2 terms (12 months) Printed Access Card
6th Edition
ISBN: 9781337589383
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: Cengage Learning
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Textbook Question
Chapter 2.2, Problem 20E
CEO Time in Meetings. The London School of Economics and the Harvard Business School have conducted studies of how chief executive officers (CEOs) spend their time. These studies have found that CEOs spend many hours per week in meetings that include conference calls, business meals, and public
- a. What is the least amount of time spent per week on meetings? The highest?
- b. Use a class width of two hours to prepare a frequency distribution and a percent frequency distribution for the data.
- c. Prepare a histogram and comment on the shape of the distribution.
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Question 2
A nickel-titanium alloy is used to make components for jet turbine aircraft engines. Cracking is a potentially
serious problem in the final part because it can lead to nonrecoverable failure. A test is run at the parts producer
to determine the effect of four factors on cracks. The four factors are: pouring temperature (A), titanium content
(B), heat treatment method (C), amount of grain refiner used (D). Two replicates of a 24 design are run, and
the length of crack (in mm x10-2) induced in a sample coupon subjected to a standard test is measured. The
data are shown in Table 2.
1
(a) Estimate the factor effects. Which factor effects appear to be large?
(b) Conduct an analysis of variance. Do any of the factors affect cracking? Use a = 0.05.
(c) Write down a regression model that can be used to predict crack length as a function of the significant
main effects and interactions you have identified in part (b).
(d) Analyze the residuals from this experiment.
(e) Is there an…
A 24-1 design has been used to investigate the effect of four factors on the resistivity of a silicon wafer. The data
from this experiment are shown in Table 4.
Table 4: Resistivity Experiment for Exercise 5
Run
A
B
с
D
Resistivity
1
23
2
3
4
5
6
7
8
9
10
11
12
I+I+I+I+Oooo
0
0
||++TI++o000
33.2
4.6
31.2
9.6
40.6
162.4
39.4
158.6
63.4
62.6
58.7
0
0
60.9
3
(a) Estimate the factor effects. Plot the effect estimates on a normal probability scale.
(b) Identify a tentative model for this process. Fit the model and test for curvature.
(c) Plot the residuals from the model in part (b) versus the predicted resistivity. Is there any indication on
this plot of model inadequacy?
(d) Construct a normal probability plot of the residuals. Is there any reason to doubt the validity of the
normality assumption?
Stem1: 1,4
Stem 2: 2,4,8
Stem3: 2,4
Stem4: 0,1,6,8
Stem5: 0,1,2,3,9
Stem 6: 2,2
What’s the Min,Q1, Med,Q3,Max?
Chapter 2 Solutions
Bundle: Modern Business Statistics with Microsoft Office Excel, Loose-Leaf Version, 6th + MindTap Business Statistics, 2 terms (12 months) Printed Access Card
Ch. 2.1 - Methods
1. The response to a question has three...Ch. 2.1 - 2. A partial relative frequency distribution is...Ch. 2.1 - A questionnaire provides 58 Yes, 42 No, and 20...Ch. 2.1 -
For the 2010–2011 viewing season, the top five...Ch. 2.1 -
In alphabetical order, the six most common last...Ch. 2.1 - Top Rated Television Show Networks. Nielsen Media...Ch. 2.1 - Airline Customer Satisfaction Survey. Many...Ch. 2.1 - Prob. 8ECh. 2.1 - Prob. 9ECh. 2.1 -
VirtualTourist provides ratings for hotels...
Ch. 2.2 - 11. Consider the following data.
Develop a...Ch. 2.2 - 12. Consider the following frequency...Ch. 2.2 - Construct a histogram for the data in exercise...Ch. 2.2 - Prob. 14ECh. 2.2 - Construct a stem-and-leaf display for the...Ch. 2.2 - Construct a stem-and-leaf display for the...Ch. 2.2 - Applications
17. A doctor’s office staff studied...Ch. 2.2 - NBA Total Player Ratings. CBSSports.com developed...Ch. 2.2 - Prob. 19ECh. 2.2 - CEO Time in Meetings. The London School of...Ch. 2.2 - Quantcast.com provides the number of people from...Ch. 2.2 - Top U.S. Franchises. Entrepreneur magazine ranks...Ch. 2.2 - Prob. 24ECh. 2.2 - Best Paying College Degrees. Each year America.EDU...Ch. 2.2 - Prob. 26ECh. 2.3 - The following data are for 30 observations...Ch. 2.3 - The following observations are for two...Ch. 2.3 - Daytona 500 Automobile Makes Average Speeds. The...Ch. 2.3 - Daytona 500 Average Speeds of Winners. The...Ch. 2.3 - 31. Recently, management at Oak Tree Golf Course...Ch. 2.3 - Household Income Levels. The following...Ch. 2.3 - 33. Each year Forbes ranks the world’s most...Ch. 2.3 - Prob. 34ECh. 2.3 -
The U.S. Department of Energy's Fuel Economy...Ch. 2.4 - The following 20 observations are for two...Ch. 2.4 - Prob. 37ECh. 2.4 - The following crosstabulation summarizes the data...Ch. 2.4 - Driving Speed and Fuel Efficiency. A study on...Ch. 2.4 - The DATAfile Snow contains average annual snowfall...Ch. 2.4 - Hypertension and Heart Disease. People often wait...Ch. 2.4 -
Smartphones are mobile phones with Internet,...Ch. 2.4 - Store Managers Time Study. The Northwest regional...Ch. 2 - SAT Scores. The SAT is a standardized test used by...Ch. 2 - Median Household Incomes. The file MedianHousehold...Ch. 2 - State Populations. Data showing the population by...Ch. 2 - Startup Company Funds. According to the Wall...Ch. 2 - Complaints Reported to BBB. Consumer complaints...Ch. 2 - Stock Price Volatility. The term “beta” refers to...Ch. 2 - Education Level and Household Income. The U.S....Ch. 2 - Prob. 51SECh. 2 - Best Places to Work. Fortune magazine publishes an...Ch. 2 - Prob. 53SECh. 2 - Prob. 54SECh. 2 - Prob. 55SECh. 2 - Prob. 56SECh. 2 -
Google has changed its strategy with regard to...Ch. 2 -
A zoo has categorized its visitors into three...Ch. 2 - Pelican Stores, a division of National Clothing,...Ch. 2 -
Motion Picture Industry
The motion picture...Ch. 2 - Cincinnati, Ohio, also known as the Queen City,...Ch. 2 - Jon Weideman, first shift foreman for Cut-Rate...
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