SOLUTION: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is wit
Algebra.Com
Question 930625: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth w eights is known to be 7 ounces.
A)10
B)81
C)9
D)82
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
n = ( 2.576(7)/2)^2 = 81.288 (Always Up to next Integer)
Sample size: 82
RELATED QUESTIONS
A nurse at a local hospital isinterested 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 nurse at a local hospital is estimating the weight of infants. how large a sample must... (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)
The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of... (answered by stanbon)
The mean birth-weight for ALL the children born at a certain hospital is 112 oz, and the... (answered by stanbon)
Birth weights at a local hospital have a normal distribution with a mean of 110 oz. and a (answered by ewatrrr)
Birth weights at a local hospital have a normal distribution with a mean of 110 ounces... (answered by ewatrrr)