SOLUTION: A tax firm wants to determine the percentage of Americans who get professional help with their tax returns. They wish to be 95% confident that the estimate is within 2.5%. How larg

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Question 1179083: A tax firm wants to determine the percentage of Americans who get professional help with their tax returns. They wish to be 95% confident that the estimate is within 2.5%. How large should the sample size be if it is estimated that 36% of Americans get help with their tax returns?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
P = .36
.95 Confident;  z = 1.96
n = %28z%2FME%29%5E2+%28p%281-p%29%29%29 = %281.96%2F.025%29%5E2+%28.36%28.64%29%29%29 = 1416.18
1417 Up to nearest whole number.

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