SOLUTION: Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.01 margin of​ error, use a confidence level of 95̴
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Question 1093247: Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.01 margin of error, use a confidence level of 95% and use results from a prior poll suggesting that 16% of adults have consulted fortune tellers.
(Round up to the nearest integer.) Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! the half interval of a confidence interval is z*sqrt(p*(1-p))/n=0.01, the margin of error.
substitute
1.96*sqrt [(0.16*0.84)/n]=0.01
square both sides, multiply by n.
3.84*0.16*0.84=0.0001n=0.5161
divide by 0.0001
n=5161
