Essentials Of Statistics For Business & Economics

9th Edition

ISBN: 9780357045435

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 9.5, Problem 45E

Bullish, Neutral, or Bearish. The American Association of Individual Investors conducts a weekly survey of its members to measure the percent who are bullish, bearish, and neutral on the stock market for the next six months. For the week ending November 7, 2012, the survey results showed 35.0% bullish, 38.6% neutral, and 26.4% bearish. Assume these results are based on a sample of 300 AAII members.

a. Over the long term, the proportion of bullish AAII members is .39. Conduct a hypothesis test at the 5% level of significance to see if the current sample results show that bullish sentiment differs from its long-term average of .39. What are your findings?
b. Over the long term, the proportion of bearish AAII members is .30. Conduct a hypothesis test at the 1% level of significance to see if the current sample results show that bearish sentiment is below its long term average of .30. What are your findings?
c. Would you feel comfortable extending these results to all investors? Why or why not?

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Chapter 9.5, Problem 44E

Chapter 9.7, Problem 46E

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Chapter 9 Solutions

Essentials Of Statistics For Business & Economics

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Solution Summary: The author concludes that there is no evidence that the bullish sentiment differs from its long-term average of 0.39.

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