Question

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 97.5% 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. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 98% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?

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 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 her. If the candidate only wants a 9% 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 82%. You would like to be 98% confident that your estimate is within 2.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=34.8σ=34.8. You would like to be 99% confident that your estimate is within 1.5 of the true population mean. How large of a sample size is required?

You want to obtain a sample to estimate how much parents spend
on their kids birthday parties. Based on previous study, you
believe the population standard deviation is approximately
σ=29.9σ=29.9 dollars. You would like to be 98% confident that your
estimate is within 2.5 dollar(s) of average spending on the
birthday parties. How many parents do you have to sample?

Answer #1

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? 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 her. If the candidate
only wants a 0.1% margin of error at a 99.5% confidence level, what
size of sample is needed? ______

A political candidate has asked you to conduct a poll to
determine what percentage of people support him. If the candidate
only wants a 0.5% margin of error at a 95% confidence level, what
size of sample is needed?

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 7% margin of error at a 90%
confidence level, what size of sample is needed?

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 5% margin of error at a 95%
confidence level, what size of sample is needed?
Give your answer in whole people.

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 3% margin of error at a 95%
confidence level, what size of sample is needed?
Give your answer in whole people.

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

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 8% margin of error at a 99%
confidence level, what size of sample is needed?
Give your answer in whole people.

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 95%
confidence level, what size of sample is needed?
Give your answer in whole people.

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 7% margin of error at a 99%
confidence level, what size of sample is needed?
Give your answer in whole people.

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