CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
13th Edition
ISBN: 9781337094399
Author: Cochran
Publisher: IACCENGAGE
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Textbook Question
Chapter 22.5, Problem 11E
A drug store chain has stores in four cities: 38 stores in Indianapolis. 45 in Louisville, 80 in St. Louis, and 70 in Memphis. Pharmacy sales in the four cities vary considerably because of the competition. The following sales data (in thousands of dollars) are available from a sample survey. Each of the cities was considered a separate stratum, and a stratified simple random sample was taken.
| Indianapolis | Louisville | St. Louts | Memphis |
| 50.3 | 48.7 | 16.7 | 14.7 |
| 41.2 | 59.8 | 38.4 | 88.3 |
| 15.7 | 28.9 | 51.6 | 94.2 |
| 22.5 | 36.5 | 42.7 | 76.8 |
| 26.7 | 89.8 | 45.0 | 35.1 |
| 20.8 | 96.0 | 59.7 | 48.2 |
| 77.2 | 80.0 | 57.9 | |
| 81.3 | 27.6 | 18.8 | |
| 22.0 | |||
| 74.3 |
- a. Estimate the mean pharmacy sales for each city (stratum).
- b. Develop an approximate 95% confidence interval for the mean pharmacy sales in each city.
- c. Estimate the proportion of stores with sales of $50,000 or more.
- d. Develop an approximate 95% confidence interval for the proportion of stores with sales of $50,000 or more.
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Chapter 22 Solutions
CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
Ch. 22.4 - Simple random sampling was used to obtain a sample...Ch. 22.4 - Prob. 2ECh. 22.4 - Prob. 3ECh. 22.4 - Prob. 4ECh. 22.4 - Prob. 5ECh. 22.4 - Prob. 6ECh. 22.5 - A stratified simple random sample was taken with...Ch. 22.5 - Prob. 8ECh. 22.5 - Prob. 9ECh. 22.5 - Prob. 10E
Ch. 22.5 - A drug store chain has stores in four cities: 38...Ch. 22.5 - Prob. 12ECh. 22.5 - Prob. 13ECh. 22.6 - A sample of four clusters is to be taken from a...Ch. 22.6 - A sample of six clusters is to be taken from a...Ch. 22.6 - Prob. 16ECh. 22.6 - Prob. 17ECh. 22 - To assess consumer acceptance of a new series of...Ch. 22 - Prob. 19SECh. 22 - A quality of life survey was conducted with...Ch. 22 - A U.S. Senate Judiciary Committee report showed...Ch. 22 - Refer again to the data in exercise 21. a. Develop...Ch. 22 - Prob. 23SECh. 22 - Prob. 24SE
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