SOLUTION: A medical reseracher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 4% of the true proportion. How large
Algebra.Com
Question 308686: A medical reseracher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 4% of the true proportion. How large should the sample size be?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 4% of the true proportion. How large should the sample size be?
---
z(99.5) = 2.5758
-------
Formula:
n = [z/E]^2(pq)
---
p= 0.5 is the least biased estimate of "p", so use it:
---
n = [2.5758/0.04]^2(0.5*0.5) = 1036.7
Round up to n = 1037
============================
Cheers,
Stan H.
============================
RELATED QUESTIONS
A medical researcher wishes to determine the percentage of females who take vitamins. He (answered by stanbon)
ANY HELP WOULD MAKE A DIFFERENCE! thank you!!!
A medical researcher wishes to... (answered by stanbon)
Amedical researcher wishes to determine the percentage of females who take vitamins he... (answered by stanbon)
The Utility company wishes to estimate the percentage of people in the U.S. who use... (answered by ewatrrr)
A researcher wishes to determine, within 4%, the true proportion of college males who... (answered by Boreal)
a researcher wishes to be 99% confident that her estimate of the true proportions of... (answered by stanbon)
A researcher wishes to estimate the proportion of college students who own a car. He... (answered by math_tutor2020)
The brand manager for a brand of toothpaste must plan a campaign designed to increase... (answered by math_tutor2020)
The brand manager for a brand of toothpaste must plan a campaign designed to increase... (answered by Boreal)