What fraction of total production will be scrap

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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.

Reference no: EM131124999

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