Practical Management Science
5th Edition
ISBN: 9781305250901
Author: Wayne L. Winston, S. Christian Albright
Publisher: Cengage Learning
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Chapter 8.9, Problem 18P
Summary Introduction
To determine: The variable that is more important for the classification.
Introduction: The variation between the present value of the
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Suppose a social psychologist sets out to see whether having children is related to relationship longevity. He decides to measure relationship satisfaction in a group of couples with children and a group of childless couples. He chooses the Marital Satisfaction Inventory because it refers to “partner” and “relationship” rather than “spouse” and “marriage,” which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater relationship satisfaction.
The psychologist administers the Marital Satisfaction Inventory to 58 couples—30 are couples with children and 28 are childless couples. He wants to calculate the correlation between a couple’s relationship satisfaction and whether they have children. Which of the following types of correlations would be most appropriate for the psychologist to use?
You are the general manager of a luxury car dealership. You are considering purchasing data from a data broker that collects data of high potential value to your dealership. In addition to providing a list of names, mailing addresses, and email addresses, the data include an approximate estimate of individuals’ annual income based on the zip code in which they live, census data, and highest level of education achieved. Using the data provided by the broker, you could establish an estimated annual income for each person on the list to identify likely purchasers of your dealership’s autos and then send emails to those potential customers. List the advantages and disadvantages of such a marketing strategy. Would you recommend this means of promotion in this instance? Why or why not?
Solve for the predicted values of y and the residuals for the following data.
Advertising
12.5
3.7
21.5
60.0
37.6
6.1
16.6
41.2
Sales
141
55
338
994
542
89
126
379
(Do not round the intermediate values. Round your answers to 4 decimal places, e.g. 1.7585.)
y
Predicted ( ŷ )
Residuals (y – ŷ )
12.5
141
3.7
55
21.5 338
60.0
994
37.6 141
6.1
89
16.6
126
41.2 379
Chapter 8 Solutions
Practical Management Science
Ch. 8.3 - Prob. 1PCh. 8.3 - Prob. 2PCh. 8.4 - Prob. 3PCh. 8.4 - Prob. 4PCh. 8.4 - Prob. 5PCh. 8.5 - Prob. 6PCh. 8.5 - Prob. 7PCh. 8.5 - In the lawn mower production problem in Example...Ch. 8.6 - Prob. 9PCh. 8.6 - Prob. 10P
Ch. 8.6 - Prob. 11PCh. 8.6 - Prob. 12PCh. 8.7 - Prob. 13PCh. 8.7 - Prob. 14PCh. 8.8 - Prob. 15PCh. 8.9 - Prob. 17PCh. 8.9 - Prob. 18PCh. 8.10 - Prob. 20PCh. 8.10 - Prob. 21PCh. 8.10 - Prob. 22PCh. 8.10 - Prob. 23PCh. 8.10 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28PCh. 8 - Prob. 29PCh. 8 - Prob. 30PCh. 8 - Prob. 31PCh. 8 - Prob. 32PCh. 8 - Prob. 33PCh. 8 - Prob. 34PCh. 8 - Prob. 35PCh. 8 - Prob. 36PCh. 8 - Prob. 37PCh. 8 - Prob. 38PCh. 8 - Prob. 39PCh. 8 - Prob. 40PCh. 8 - Prob. 41PCh. 8 - Prob. 42PCh. 8 - Prob. 43PCh. 8 - Prob. 44PCh. 8 - Prob. 46PCh. 8 - Prob. 1CCh. 8 - Prob. 2C
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