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 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 5% 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 5% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.
Transcribed Image Text: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 90% confidence level, what size of
sample is needed?
Give your answer in whole people.
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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