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September 21, 2014

Homework Help: statistics

Posted by Bryant on Friday, July 31, 2009 at 10:18pm.

An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of = 3 lb-ft in the torque applied. A simple random sample of 35 nuts is selected, and the average torque to which they have been tightened is 150 lb-ft. What is the 95% confidence interval for the average torque being applied during the assembly process?

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