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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 7%

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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 7% 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. Hint: Video ' [+]

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