SOLUTION: a nurse at a local hospital is estimating the weight of infants. how large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the
Algebra.Com
Question 80420: a nurse at a local hospital is estimating the weight of infants. how large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean? sd=7
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a nurse at a local hospital is estimating the weight of infants. how large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean? sd=7
---------
E = z*sigma/sqrt(n)
sqrt(n) = z*sigma/E
Your Problem:
sqrt(n) = 1.96*7/3
sqrt(n) = 4.57333
n= 20.91..
Rounding up: n=21
===========
Cheers,
Stan H.
RELATED QUESTIONS
A nurse at a local hospital isinterested in estimating the birth weight of infants. How... (answered by ewatrrr)
A nurse at a local hospital is interested in estimating the birth weight of infants. How... (answered by ewatrrr)
A doctor at a local hospital is interested in estimating the birth weight of infants. How (answered by stanbon)
A doctor at a local hospital is interested in estimating the birth weight of infants. How (answered by Theo)
a doctor at a local hospital is interested in estimating the birth weight of infants.How... (answered by ewatrrr)
A health care professional wishes to estimate the birth weights of infants. How large a... (answered by math_tutor2020)
A random sample of 50 four-year-old’s attending day care centers provided a yearly... (answered by ikleyn)
The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of... (answered by stanbon)
8. A hospital in a large city records the weight of every infant born at the hospital.... (answered by ikleyn)