SOLUTION: 10. In a poll, 341 out of 775 New York voters surveyed indicated that they approve of the job DeBlasio has done as mayor. Make a 99% confidence interval for the percentage of all

Algebra ->  Probability-and-statistics -> SOLUTION: 10. In a poll, 341 out of 775 New York voters surveyed indicated that they approve of the job DeBlasio has done as mayor. Make a 99% confidence interval for the percentage of all       Log On


   

Question 971404: 10. In a poll, 341 out of 775 New York voters surveyed indicated that they approve of the job DeBlasio has done as mayor. Make a 99% confidence interval for the percentage of all New York voters who would approve of DeBlasio’s performance as mayor. Describe the meaning of the interval that you found.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
In a poll, 341 out of 775 New York voters surveyed indicated that they approve of the job DeBlasio has done as mayor. Make a 99% confidence interval for the percentage of all New York voters who would approve of DeBlasio’s performance as mayor. Describe the meaning of the interval that you found.
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p-hat = 341/775 = 0.44
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ME = 2.5758*sqrt[0.44*0.56/441] = 0.0609
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99%CI:: 0.44-0.06 < p < 0.44+0.06
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99%CI:: 0.38 < p < 0.50
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Mean:: We have 99% confidence that the population proportion is
between 38% and 50%
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Cheers,
Stan H.
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