1.- A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 0.2% margin of error at a 95% confidence level, what size of sample is needed? When finding the z-value, round it to four decimal places.

_____________

2.- population proportion. You would like to be 95% confident that you estimate is within 1% of the true population proportion. How large of a sample size is required?

n=_________

3.-A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 9% margin of error at a 99% confidence level, what size of sample is needed? When finding the z-value, round it to four decimal places.

_____________

4.- You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.36. You would like to be 90% confident that your esimate is within 3% of the true population proportion. How large of a sample size is required?

n=_____________