A poll of 360 randomly selected Rochesterians showed that 234 of them voted in last month's election. Find the 90% confidence interval of the true population proportion Rochesterians who voted.

In a survey of 700 randomly selected union members, it is found that 332 favor the republican candidate for governor. Use this to contrust the 95% confidence interval for the true population proportion of all union members who favor the republician candidate.

A survey of 300 union members in New York State reveals that 112 favor the Republican candidatefor governor. Construct the 98% confidence interval for the true population proportion of all NewYork State union members who favor the Republican candidate.

A recent survey showed that 42% of US employers were likely to require higher employee contributions for health care coverage. Suppose the survey was based on a sample of 500 companies. Find the 99% confidence interval for the proportion of all companies likely to require higher employee contributions for health care coverage. (Round to four decimal places)