Question 560156: A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 36% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 36% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary.
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n = [z/E]^2*pq
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n = [1.96/0.02]^2*0.36*0.64 = 221,277 when rounded up
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Cheers,
Stan H.
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