A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 4% margin of error at a 90% confidence level, what size of sample is needed? When finding the z-value, round it to four decimal places
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 4% margin of error at a 90% confidence level, what size of sample is needed? When finding the z-value, round it to four decimal places
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.39. You would like to be 97% confident that your esimate is within 3% of the true population proportion. How large of a
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 87%. You would like to be 99% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required?
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