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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
1. The Farley Manufacturing Company prides itself on the quality of its products. The company is engaged in competition for a very important project. A key element is a part that ultimately goes into precision testing equipment. The specifications are 8.000± 3.000 millimeters. Management is concerned about the capability of the process to produce that part. The accompanying data were randomly collected during test runs of the process.
  Observation (millimeters)                   Â
Sample 1 2 3 4 5 6 7 8
1Â Â 7.400Â Â 8.400Â Â 9.200Â Â 8.400Â Â 8.300Â Â 9.900Â Â 9.300Â Â 8.900
2Â Â 8.000Â Â 7.900Â Â 7.900Â Â 8.900Â Â 8.200Â Â 8.800Â Â 9.300Â Â 9.200
3Â Â 9.200Â Â 8.700Â Â 8.700Â Â 7.600Â Â 9.600Â Â 8.500Â Â 9.400Â Â 8.300
4Â Â 9.700Â Â 8.600Â Â 9.000Â Â 9.200Â Â 9.600Â Â 7.100Â Â 9.500Â Â 9.500
5Â Â 8.900Â Â 9.300Â Â 7.100Â Â 8.900Â Â 7.400Â Â 7.000Â Â 9.900Â Â 8.800
The process capability? index,Cpk?, is equal to _______?(Enter your response rounded to three decimal? places.)
Assume that the process is in statistical control. Is the process capable of producing the part at the four?-sigma ?level? Explain.
Since Cp equals ______ the process is:
(a)not capable because there are too many parts outside of the allowable tolerances/b)is not capable because the process is not centered correctly/c)is capableb?
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