Question: An automatic screw machine produces bolts with a specific diameter of 8.50 0.25 mm. The process that is operating in control produces bolts with mean

An automatic screw machine produces bolts with a specific diameter of 8.50 0.25 mm. The process that is operating in control produces bolts with mean 8.50 mm and average range of 0.31 mm. Take the sample size of each sample to be five if needed.

a) Name the quality characteristic of interest in this problem (1)

b) Estimate the fraction and number of shafts per million produced that conform to specifications. (6) c) Estimate the fraction and number of shafts per million produced that exceed over and above the upper specification of limit

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