SOLUTION: A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2% of the true proportion. How lar
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Question 560157: A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2% of the true proportion. How large should the sample size be? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2% of the true proportion. How large should the sample size be?
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n = [z/E]^2*pq
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Since "p" is not know you should use p = 1/2
n = [2.3263/0.02]^2*(1/2)(1/2)
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n = 3383 when rounded up
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Cheers,
Stan H.
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