SOLUTION: 700 patrons participated in a poll taken at local bars in Spokane, WA area. the poll showed that 278 of the patrons used tobacco products. How large of a sample is necessary if t

Question 407797: 700 patrons participated in a poll taken at local bars in Spokane, WA area. the poll showed that 278 of the patrons used tobacco products. How large of a sample is necessary if the researchers want to be 98% confident of their results?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
700 patrons participated in a poll taken at local bars in Spokane, WA area. the poll showed that 278 of the patrons used tobacco products. How large of a sample is necessary if the researchers want to be 98% confident of their results? I omitted the section that said 98% confident of results within 3.5%.
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n = [z/E]^2pq
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n = [2.326/0.035]^2*(1/2)(1/2)
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n = [66.46]^2*(1/4)
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n = 1104.14
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Round up to n = 1105
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Cheers,
Stan H.
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