Intro Stats + MyStatLab Access Code
4th Edition
ISBN: 9780321891242
Author: De Veaux, Richard
Publisher: Pearson College Div
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Chapter 2, Problem 46E
Be a Simpson Can you design a Simpson’s paradox? Two companies are vying for a city’s “Best Local Employer” award, to be given to the company most committed to hiring local residents. Although both employers hired 300 new people in the past year, Company A brags that it deserves the award because 70% of its new jobs went to local residents, compared to only 60% for Company B. Company B concedes that those percentages are correct, but points out that most of its new jobs were full-time, while most of Company A’s were part-time. Not only that, says Company B, but a higher percentage of its full-time jobs went to local residents than did Company A’s, and the same was true for part-time jobs. Thus, Company B argues, it’s a better local employer than Company A.
Show how it’s possible for Company B to fill a higher percentage of both full-time and part-time jobs with local residents, even though Company A hired more local residents overall.
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Be a Simpson Can you design a Simpson’s paradox? Twocompanies are vying for a city’s “Best Local Employer”award, to be given to the company most committed tohiring local residents. Although both employers hired300 new people in the past year, Company A brags that itdeserves the award because 70% of its new jobs went tolocal residents, compared to only 60% for Company B.Company B concedes that those percentages are correct,
but points out that most of its new jobs were full-time,while most of Company A’s were part-time. Not only that,says Company B, but a higher percentage of its full-timejobs went to local residents than did Company A’s, andthe same was true for part-time jobs. Thus, Company Bargues, it’s a better local employer than Company A.Show how it’s possible for Company B to fill a higherpercentage of both full-time and part-time jobs with local
residents, even though Company A hired more local resi-dents overall.
If surgical procedure A has a higher success rate than surgical procedure B in every hospital where they are used and yet procedure B has a higher overall success rate, then we suspect that
A)
this is nonsense and it can’t possibly be true.
B)
this is an example of Simpson’s paradox.
C)
it must be easier to achieve success at some hospitals than at others, whatever procedure is used.
D)
procedure B must be used predominantly in hospitals where it is easier to achieve success, while procedure A must be used predominantly where it is harder to achieve success.
E)
all of (b), (c), and (d) are true.
A study was conducted to see whether participants would ignore a sign that said, "Elevator may stick between floors. Use the stairs." Those who used the stairs were said to be compliant, and those who used the elevator were said to be noncomplaiant. There were three possible situations, two of which involved confederates. A confederate is a person who is secretly working with the experimenter. In the first situation, there was no confederate. In the second situation, there was a compliant confederate (one who used the stairs), and in the third situation, there was a noncompliant confederate (one who used the elevator). The subjects tended to imitate the confederates. What more do you need to know about the study to determine whether the prescence or absence of a confederate causes a change in the compliance of subjects?
Chapter 2 Solutions
Intro Stats + MyStatLab Access Code
Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - Prob. 4JCCh. 2.2 - Prob. 5JCCh. 2.2 - A statistics class reports the following data on...Ch. 2.2 - Prob. 7JCCh. 2 - Prob. 1ECh. 2 - Prob. 2ECh. 2 - Prob. 3E
Ch. 2 - Marriage in decline Changing attitudes about...Ch. 2 - 5. Movies again The following table summarizes 348...Ch. 2 - Prob. 6ECh. 2 - Prob. 11ECh. 2 - 12. Movie ratings The pie chart shows the ratings...Ch. 2 - Prob. 13ECh. 2 - Prob. 14ECh. 2 - Prob. 15ECh. 2 - Prob. 16ECh. 2 - Prob. 17ECh. 2 - Prob. 18ECh. 2 - Prob. 19ECh. 2 - Prob. 20ECh. 2 - Prob. 21ECh. 2 - Modalities A survey of athletic trainers asked...Ch. 2 - Prob. 23ECh. 2 - Prob. 24ECh. 2 - Prob. 25ECh. 2 - Prob. 26ECh. 2 - Prob. 27ECh. 2 - Politics Students in an Intro Stats course were...Ch. 2 - More about seniors Look again at the table of...Ch. 2 - Politics revisited Look again at the table of...Ch. 2 - Prob. 31ECh. 2 - More politics Look once more at the table...Ch. 2 - Prob. 33ECh. 2 - Parking lots A survey of autos parked in student...Ch. 2 - Weather forecasts Just how accurate are the...Ch. 2 - Prob. 36ECh. 2 - Blood pressure A company held a blood pressure...Ch. 2 - Prob. 38ECh. 2 - Prob. 39ECh. 2 - Antidepressants and bone fractures For a period of...Ch. 2 - Prob. 41ECh. 2 - Prob. 42ECh. 2 - Hospitals Most patients who undergo surgery make...Ch. 2 - Delivery service A company must decide which of...Ch. 2 - Graduate admissions A 1975 article in the magazine...Ch. 2 - Be a Simpson Can you design a Simpsons paradox?...
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