Construct a 95 percent confidence interval

Reference no: EM13191129

1.) In a poll to estimate presidential popularity, each person in a random sample of 1,000 voters was asked to agree with one of the following statements:

1. The President is doing a good job.
2. The President is doing a poor job.
3. I have no opinion.

A total of 560 respondents selected the first statement, indicating they thought the President was doing a good job.

A. Construct a 95 percent confidence interval for the proportion of respondents who feel the President is doing a good job.

B. Based on your interval in part (a), is it reasonable to conclude that a majority (more than half) of the population believes the President is doing a good job?

2.) The Tennessee Tourism Institute (TTI) plans to sample information center visitors entering the state to learn the fraction of visitors who plan to camp in the state. Current estimates are that 35 percent of visitors are campers. How large a sample would you take to estimate at a 95 percent confidence level the population proportion with an allowable error of 2 percent?

Reference no: EM13191129

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