1. In a current election campaign, PSI has just found that 220 registered voters, out of 500 contacted, favor a particul

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1. In a current election campaign, PSI has just found that 220 registered voters, out of 500 contacted, favor a particul

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1 In A Current Election Campaign Psi Has Just Found That 220 Registered Voters Out Of 500 Contacted Favor A Particul 1
1 In A Current Election Campaign Psi Has Just Found That 220 Registered Voters Out Of 500 Contacted Favor A Particul 1 (24.31 KiB) Viewed 28 times
1. In a current election campaign, PSI has just found that 220 registered voters, out of 500 contacted, favor a particular candidate. a. What's the 95% confidence interval estimate for the proportion of the population of registered voters that favor the candidate? b. Suppose that PSI would like a 99 probability that the sample proportion is within +.03 of the population proportion. How large a sample size is needed to meet the required precision? (A previous sample of similar units yielded.44 for the sample proportion.)
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