nterval 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 0.27. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05? A sample of adults is needed to obtain a 98% confidence interval with a margin of error of 0.05. X Ś

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A pollster wants to construct a 98% confidence interval for the proportion of adults who believe that economic conditions are getting better. (a) A poll taken in July 2010 estimates this proportion to be 0.27. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05?
How's the economy? A pollster wants to construct a 98% 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 0.27. Using
this estimate, what sample size is needed so that the confidence
interval will have a margin of error of 0.05?
A sample of adults is needed to obtain a 98%
confidence interval with a margin of error of 0.05.
X
Ś
Transcribed Image Text:How's the economy? A pollster wants to construct a 98% 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 0.27. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05? A sample of adults is needed to obtain a 98% confidence interval with a margin of error of 0.05. X Ś
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