Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Chapter 2, Problem 43E
Hospitals Most patients who undergo surgery make routine recoveries and are discharged as planned. Others suffer excessive bleeding, infection, or other postsurgical complications and have their discharges from the hospital delayed. Suppose your city has a large hospital and a small hospital, each performing major and minor surgeries. You collect data to see how many surgical patients have their discharges delayed by postsurgical complications, and you find the results shown in the following table:
| Discharge Delayed Large Hospital | Small Hospital | |
| Major Surgery | 120 of 800 | 10 of 50 |
| Minor Surgery | 10 of 200 | 20 of 250 |
- a) Overall, for what percent of patients was discharge delayed?
- b) Were the percentages different for major and minor surgery?
- c) Overall, what were the discharge delay rates at each hospital?
- d) What were the delay rates at each hospital for each kind of surgery?
- e) The small hospital advertises that it has a lower rate of postsurgical complications. Do you agree?
- f) Explain, in your own words, why this confusion occurs.
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Chapter 2 Solutions
Intro Stats
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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