Near the time of an election, a cable news service performs an opinion poll of 1,000 probable voters. It shows that the Republican contender has an advantage of 52% to 48%.

a.	Develop a 95% confidence interval for the proportion favoring the Republican candidate. (Round your answers to 3 decimal places.)

Confidence interval

and

b.	Estimate the probability that the Democratic candidate is actually leading. (Round your answersto 4 decimal places.)

Probability

c.	Repeat the above analysis based on a sample of 3,000 probable voters. (Round your interval to 3 decimal places and Probability to 4 decimal places.)

Confidence interval

and

Probability

rev: 01_09_2014_QC_43206 References eBook & Resources WorksheetDifficulty: Medium