Question

10. A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 1% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.

11. In a political poll 48% of people supported Propostion A. The margin of error was ±2% for a 80% confidence interval. What are the upper and lower limits of the confidence interval? Enter the answers as percentages with no decimals with the lower limit first.

( _____% , _____ % )

From this result can you conclude public support for Proposition A is greater than one-half with 80$ odds? Yes or no?

Answer 1