SOLUTION: A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 8% margin of error at a 99% confidence le

Question 1119720: A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only wants a 8% margin of error at a 99% confidence level, what size of sample is needed?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the error is from the standard error*z
e=z*sqrt(p*(1-p)/n))
.08=2.576*sqrt(p*(1-p)/n))
square both sides
0.0064=6.64*.5*.5/n, using .5, which is the most conservative estimate since it is the p that maximizes the error value
0.0064=1.66/n
n=259.4 or 260

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