SOLUTION: A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 36% of those interviewed had a computer at home

Question 560156: A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 36% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 36% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary.
-----
n = [z/E]^2*pq
---
n = [1.96/0.02]^2*0.36*0.64 = 221,277 when rounded up
===========================
Cheers,
Stan H.
RELATED QUESTIONS
A researcher wants to estimate with 99% confidence, the proportion of people who have a... (answered by MathTherapy)

A research company wishes to estimate, with 95% confidence, the proportion of people who... (answered by stanbon)

A researcher wishes to determine, within 4%, the true proportion of college males who... (answered by Boreal)

A researcher wishes to estimate the proportion of college students who own a car. He... (answered by math_tutor2020)

A biologist wants to estimate with 99% confidence the proportion of people who trust dna... (answered by reviewermath)

A music industry researcher wants to estimate, with a 95% confidence level, the... (answered by Boreal)

A researcher wishes to estimate, with 95% confidence, the proportion of adults who have... (answered by Boreal)

A researcher wishes to estimate the number of households with two computers. How large a... (answered by stanbon)

A researcher wishes to estimate the proportion of adults who have high-speed... (answered by MathTherapy)