A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that

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A pollster wants to construct a 95%

confidence interval for the proportion of adults who believe that economic conditions are getting better.

a. A Gallup poll estimates this proportion to be 0.34. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03?

b. Estimate the sample size needed if no estimate of p is available.

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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Question Posted: May 07, 2024 12:02 PM

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A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that

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Elementary Statistics

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