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10 proper- ties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetra- tion (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.7 and a sample standard deviation of s = 4.8. The conduits were manufac- tured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demon- strated conclusively that the specification has not been met. What would you conclude?

10 proper- ties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetra- tion (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.7 and a sample standard deviation of s = 4.8. The conduits were manufac- tured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demon- strated conclusively that the specification has not been met. What would you conclude?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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22. To obtain information on the corrosion-resistance proper- ties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetra- tion (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.7 and a sample standard deviation of s = 4.8. The conduits were manufac- tured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demon- strated conclusively that the specification has not been met. What would you conclude?
Transcribed Image Text:22. To obtain information on the corrosion-resistance proper- ties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetra- tion (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.7 and a sample standard deviation of s = 4.8. The conduits were manufac- tured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demon- strated conclusively that the specification has not been met. What would you conclude?
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