SOLUTION: Portly Polls plans on surveying fourth year about still had their original major. They need a 90% confidence level and a margin of error of 1% or less. How many students should be
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Question 564991: Portly Polls plans on surveying fourth year about still had their original major. They need a 90% confidence level and a margin of error of 1% or less. How many students should be included in the survey?
You can put this solution on YOUR website! Portly Polls plans on surveying fourth year about still had their original major. They need a 90% confidence level and a margin of error of 1% or less. How many students should be included in the survey?
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n = [z*s/E]^2
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n = [1.645*s/0.01]^2
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Comment: You need a standard deviation to get the number.
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Cheers,
Stan H.