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Birth Weights of InfantsA health care professional wishes
Chapter 7, Problem 23E(choose chapter or problem)
Problem 23E
Birth Weights of InfantsA health care professional wishes to estimate the birth weights of infants. How large a sample must be obtained if she desires to be 90% confident that the true mean is within 2 ounces of the sample mean? Assume σ = 8 ounces.
Questions & Answers
QUESTION:
Problem 23E
Birth Weights of InfantsA health care professional wishes to estimate the birth weights of infants. How large a sample must be obtained if she desires to be 90% confident that the true mean is within 2 ounces of the sample mean? Assume σ = 8 ounces.
ANSWER:
Solution:
Step 1 of 2:
From the given problem, we have
The standard deviation ounces.
E = 2
Here we have to find the sample size.