SOLUTION: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p ∗ = 64 % . You woul

Question 1193405: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately
p
∗
=
64
%
. You would like to be 95% confident that your esimate is within 3% of the true population proportion. How large of a sample size is required?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
error=z(0.975)*sqrt(p*(1-p)/n)
0.03=1.96*sqrt*(0.64*0.36)/n
square both sides
0.0009=3.8416*0.2304/n
n=983.44 or 984
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