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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
In Exercise 4.66, what should the mean diameter be in order that the fraction of bearings scrapped be minimized?
Exercise 4.66
A machining operation produces bearings with diameters that are normally distributed with mean 3.0005 inches and standard deviation .0010 inch. Specifications require the bearing diameters to lie in the interval 3.000}.0020 inches. Those outside the interval are considered scrap and must be remachined. With the existing machine setting, what fraction of total production will be scrap?
a Answer the question, using Table 4, Appendix 3.
b Applet Exercise Obtain the answer, using the applet Normal Probabilities.
Table 4

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