EBK STATISTICS FOR BUSINESS & ECONOMICS
12th Edition
ISBN: 9780100460461
Author: Anderson
Publisher: YUZU
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Chapter 12.3, Problem 23E
The wall street Journal’s Shareholder Scoreboard tracks the performance of 1000 major U.S. companies. The performance of each company is rated based on the annual total return, including stock price changes and the reinvestment of dividends. Ratings are assigned by dividing all 1000 companies into five groups from A (top 20%), B (next 20%), to E (bottom 20%). Shown here are the one-year ratings for a sample of 60 of the largest companies. Do the largest companies differ in performance from the performance of the 1000 companies in the Shareholder Scoreboard? use α = .05.
| A | B | C | D | E |
| 5 | 8 | 15 | 20 | 12 |
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The Wall Street Journal's Shareholder Scoreboard tracks the performance of 1,000 major U.S. companies. The performance of each company is roted based on the annual total retum, including stock
price changes and the re investment of dividends. Ratings are assigned by dividing all 1,000 companies into five groups from A (top 20%), B (next 20%), to E (bottom 20%). Shown here are the ene-
year ratings for a sample of 60 of the largest companies
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s 15 20 12
Do the largest companies differ in performance from the performance or the 1,000 companies in the Shareholder Scoreboard? Use a0.05,
State the nu and alternative hypotheses
Hei The proportions of the largest companies compared to the 1,000 companies are the same for the majority of the five groups.
H The proportions of the largest companies compared to the 1,000 companies are different for the majority of the five groups.
Ho: The largest companies differ in…
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Chapter 12 Solutions
EBK STATISTICS FOR BUSINESS & ECONOMICS
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Ch. 12.2 - A Bloomberg Businessweek subscriber study asked,...Ch. 12.2 - A Deloitte employment survey asked a sample of...Ch. 12.2 - health insurance benefits vary by the size of the...Ch. 12.2 - A vehicle quality survey asked new owners a...Ch. 12.2 - The Wall Street Journal Corporate Perceptions...Ch. 12.2 - As the price of oil rises, there is increased...Ch. 12.2 - The national Sleep Foundation used a survey to...Ch. 12.2 - Prob. 18ECh. 12.3 - Test the following hypotheses by using the 2...Ch. 12.3 - The following data are believed to have come from...Ch. 12.3 - During the first 13 weeks of the television...Ch. 12.3 - Mars, Inc. manufactures MMs, one of the most...Ch. 12.3 - The wall street Journals Shareholder Scoreboard...Ch. 12.3 - The national highway Traffic Safety administration...Ch. 12.3 - use = .01 and conduct a goodness of fit test to...Ch. 12.3 - The weekly demand for a product is believed to be...Ch. 12 - In a quality control test of parts manufactured at...Ch. 12 - Phoenix Marketing international identified...Ch. 12 - Samples taken in three cities, Anchorage, Atlanta,...Ch. 12 - A Pew Research Center survey asked respondents if...Ch. 12 - Bara Research Group conducted a survey about...Ch. 12 - An ambulance service responds to emergency calls...Ch. 12 - Based on sales over a six-month period, the five...Ch. 12 - A random sample of final examination grades for a...Ch. 12 - A salesperson makes four calls per day. A sample...Ch. 12 - In a study conducted by Zogby International for...
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