General hythere, inc., is a manufacturer of hydraulic machine tools
General HyThere, Inc., is a manufacturer of hydraulic machine tools. It has had a history leakage trouble resulting from a certain critical fitting. Twenty five samples of machined parts were selected, one per shift, and the diameters of the fitting was measured. Required: a. Construct x-bar- and R-charts for the data. What do you observe? b. If the regular machine operator was absent when samples 4, 8, 14, 22 were taken, how will the results in part (a) be affected? c. A second table in the worksheet represents measurements taken during the next 10 shifts. Does the process continue to remain stable? What information does this table provide to the quality control manager? Can you show how you entered the data into excel to get the graphs please. Diameter Measurement (cm) Observations Sample 1 2 3 4 1 10.94 10.64 10.88 10.7 2 10.66 10.66 10.68 10.68 3 10.68 10.68 10.62 10.68 4 10.03 10.42 10.48 11.06 5 10.7 10.46 10.76 10.8 6 10.38 10.74 10.62 10.54 7 10.46 10.9 10.52 10.74 8 10.66 10.04 10.58 11.04 9 10.5 10.44 10.74 10.66 10 10.58 10.64 10.6 10.26 11 10.8 10.36 10.6 10.22 12 10.42 10.36 10.72 10.68 13 10.52 10.7 10.62 10.58 14 11.04 10.58 10.78 10.17 15 10.52 10.4 10.6 10.4 16 10.38 10.02 10.6 10.6 17 10.56 10.68 10.78 10.34 18 10.58 10.5 10.48 10.6 19 10.42 10.74 10.64 10.5 20 10.48 10.44 10.32 10.7 21 10.56 10.78 10.46 10.42 22 10.82 10.64 11 10.01 23 10.28 10.46 10.82 10.84 24 10.64 10.56 10.92 10.54 25 10.84 10.68 10.44 10.68 c) The following table represents measurements taken during the next 10 shifts. Observations Sample 1 2 3 4 1 10.4 10.76 10.54 10.64 2 10.6 10.28 10.74 10.86 3 10.56 10.58 10.64 10.7 4 10.7 10.6 10.74 10.52 5 11.02 10.36 10.9 11.02 6 10.68 10.38 10.22 10.32 7 10.64 10.56 10.82 10.8 8 10.28 10.62 10.4 10.7 9 10.5 10.88 10.58 10.54 10 10.36 10.44 10.4 10.66
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