How's the economy? A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. Part: 0/ 2 Part 1 of 2 (a) A poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? A sample of | adults is needed to obtain a 95% confidence interval with a margin of error of 0.03.

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How's the economy? A polister wants to construct a 95% confidence interval for the proportion of adults who believe that
economic conditions are getting better.
Part: 0/2
Part 1 of 2
(a) A poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that
the confidence Interval will have a margin of error of 0.03?
A sample of
adults is needed to obtain a 95% confidence interval with a margin of error
of 0.03.
Transcribed Image Text:How's the economy? A polister wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. Part: 0/2 Part 1 of 2 (a) A poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence Interval will have a margin of error of 0.03? A sample of adults is needed to obtain a 95% confidence interval with a margin of error of 0.03.
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