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Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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MO21. A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with population variance equal to 991(psi)^2. A random sample of 12 specimens has a mean compressive strength of 3317 psi. Construct a 95% two-sided confidence interval on mean compressive strength. The upper limit of the Cl of the Cl is Blank 1 in the blank provided up to 2 decimal places. Show all necessary solutions in the submission for both upper and lower limit. Blank 1 Add your answer
Transcribed Image Text:MO21. A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with population variance equal to 991(psi)^2. A random sample of 12 specimens has a mean compressive strength of 3317 psi. Construct a 95% two-sided confidence interval on mean compressive strength. The upper limit of the Cl of the Cl is Blank 1 in the blank provided up to 2 decimal places. Show all necessary solutions in the submission for both upper and lower limit. Blank 1 Add your answer
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