SOLUTION: In a recent presidential election, 611 voters were surveyed and 308 of them said that they voted for the candidate who won (based on data from the ICR Survey Research Group). Find
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Question 1114842: In a recent presidential election, 611 voters were surveyed and 308 of them said that they voted for the candidate who won (based on data from the ICR Survey Research Group). Find a 99% confidence interval estimate of the percentage of voters who said that they voted for the candidate who won.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a recent presidential election, 611 voters were surveyed and 308 of them said that they voted for the candidate who won (based on data from the ICR Survey Research Group). Find a 99% confidence interval estimate of the percentage of voters who said that they voted for the candidate who won.
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sample proportion:: 308/611 = 0.5041
ME = z*sqrt(pq/n) = 2.5758*sqrt[(308/611)*(303/611)/611] = 0.0521
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99% CI: 0.5041-0.0521 < p < 0.5041+0.0521
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Cheers,
Stan H.
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