1.A research institute poll asked respondents if they felt vulnerable to identity theft. In thepoll, n=910 and x=541 who said"yes." Use a 90% confidence level.

Find the best point estimate of the population proportion p. (Round to three decimal places asneeded.)

2.A drug is used to help prevent blood clots in certain patients. In clinicaltrials, among 4749 patients treated with thedrug, 171 developed the adverse reaction of nausea. Construct a 99% confidence interval for the proportion of adverse reactions.

Find the best point estimate of the population proportion p. (Round to three decimal places asneeded.)

3.In a study of cell phone use and brain hemisphericdominance, an Internet survey wase-mailed to 2560 subjects randomly selected from an online group involved with ears. 1173 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys.

Find the best point estimate of the population proportion p.

(Round to three decimal places asneeded.)