SOLUTION: You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like

Question 1197341: You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 90% confident that you estimate is within 2.5% of the true population proportion. How large of a sample size is required?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi  
 90% confident ⇒  z = 1.645, 
p = .50(Generally .5 is used if p is not given)  ME = .025
How large of a sample size is required?
n = 
n =  = 1082.41  0r sample Size = 1083 (always round Up)

 = 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.

RELATED QUESTIONS
You want to obtain a sample to estimate a population proportion. At this point in time,... (answered by Theo)

You want to obtain a sample to estimate a population proportion. At this point in time,... (answered by Boreal)

You want to obtain a sample to estimate a population proportion. At this point in time,... (answered by stanbon)

You want to obtain a sample to estimate a population proportion. You have no reasonable... (answered by Boreal)

you want to obtain a sample to estimate the population proportion you would like to be at (answered by ewatrrr)

You work for a marketing firm that has a large client in the automobile industry. You... (answered by Boreal)

You want to estimate, with 95% confidence, the population proportion of U.S. adults who... (answered by stanbon)

A random sample of medical files is used to estimate the proportion p of all people who... (answered by stanbon)

A random sample of medical files is used to estimate the proportion of all people that... (answered by stanbon)