5.3.5. Suppose a sample of size n is to be drawn from a normal distribution where σ is known to be 14.3. How large does n have to be to guarantee that the length of the 95% confidence interval for μ will be less than 3.06?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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5.3.5. Suppose a sample of size n is to be drawn from a
normal distribution where σ is known to be 14.3. How
large does n have to be to guarantee that the length of
the 95% confidence interval for μ will be less than 3.06?
Transcribed Image Text:5.3.5. Suppose a sample of size n is to be drawn from a normal distribution where σ is known to be 14.3. How large does n have to be to guarantee that the length of the 95% confidence interval for μ will be less than 3.06?
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ISBN:
9780321964038
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GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,