SOLUTION: suppose a pollster wants a 90% confidence level with a 2% margin of error. How many people should be surveyed?
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Question 632202: suppose a pollster wants a 90% confidence level with a 2% margin of error. How many people should be surveyed? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! suppose a pollster wants a 90% confidence level with a 2% margin of error. How many people should be surveyed?
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n = [1.645*s/0.02]^2
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The standard deviation (s) is missing.
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Cheers,
Stan H.
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