Question: Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue. The number of people polled is usually on the order of 1000. Suppose that one such poll asks voters how they feel about the President’s handling of the situation in Iraq. The results show that 575 out of the 1280 people polled say they either "approve" or "strongly approve" of the President’s handling of this matter.

1. Based on the sample referenced above, find a 95% confidence interval estimate for the proportion of the entire voter population who "approve" or "strongly approve" of the President’s handling of the situation in Iraq. Justify your answer and place it in the space below . (5pts)

b. How large a sample would this pollster need to take to ensure that, with 95% confidence, he or she could estimate the fraction of voters who "approve" or "strongly approve" of the President’s handling of the situation in Iraq within 2% of the actual value? Place your answer in the space below . (5pts)

Price: $2.99

Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document