1st Edition

ISBN: 9781938168208

Author: Barbara Illowsky, Susan Dean

Publisher: OpenStax College

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Textbook Question

Chapter 8, Problem 130H

On May 23, 2013, Gallup reported that of the 1,005 people surveyed. 76% of U.S. workers believe that they will continue wotidng past tetliement age. The confidence level for this study was reported at 95% wIth a 3% mat gin of error.

a. Determine the estimated proportion from the sample.

b. Determine the sample size.

c. Identif CL and a.

d. Calculate the error bound based on the Information provided.

e. Compare the error bound In part d to the margin of error reported by Gallup. Explain any differences between the values.

f. Create a confidence Interval for the results of this study.

g. A reporter is covering the release of this study for a local neiss station. How should she explain the confidence interval to her audience?

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Chapter 8, Problem 129H

Chapter 8, Problem 131H

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