SOLUTION: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 73%. You would like to be 90% con

Algebra ->  Probability-and-statistics -> SOLUTION: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 73%. You would like to be 90% con      Log On


   

Question 1197344: ou want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 73%. You would like to be 90% confident that your estimate is within 4% of the true population proportion. How large of a sample size is required?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi  
90% confident ⇒  z = 1.645, 
p = .73,  ME = .04
How large of a sample size is required?
n = %28z%2FME%29%5E2+%28p%281-p%29%29%29
n = %281.645%2F.04%29%5E2+%28.73%28.27%29%29%29 = 333.348  0r sample Size = 334

 = CI	z = value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576
Wish You the Best in your Studies.