Statistics for Business & Economics, Revised (MindTap Course List)
12th Edition
ISBN: 9781285846323
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Textbook Question
Chapter 11.1, Problem 7E
To analyze the risk, or volatility, associated with investing in General Electric common stock, a sample of the eight quarterly percent total returns was identified as shown below (Charles Schwab website, January 2012). The percent total return includes the stock price change plus the dividend payment for the quarter.
| 20.0 | −20.5 | 12.2 | 12.6 | 10.5 | −5.8 | −18.7 | 15.3 |
- a. What is the value of the sample
mean ? What is its interpretation? - b. Compute the sample variance and sample standard deviation as measures of volatility for the quarterly return for general electric.
- c. Construct a 95% confidence interval for the population variance.
- d. Construct a 95% confidence interval for the population standard deviation.
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Chapter 11 Solutions
Statistics for Business & Economics, Revised (MindTap Course List)
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