To monitor the manufacturing process of rubber support bearings
used between the super- structure and foundation...
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To monitor the manufacturing process of rubber support bearingsused between the super- structure and foundation pads of nuclearpower plants, a quality control engineer randomly sampled 100bearings from the production line each day over a 15-day period.The bear- ings were inspected and the number of defects was found.The number of defects in your personalised data set are asfollows:
1, 12, 3, 4, 4, 2, 4, 5, 4, 1, 9, 3, 3, 2, 2
(a) Use R to plot the appropriate control chart to check if theproportion of non-conforming units was in control.
(b) Using manual working, verify that the control limits arewhat you expect them to be.
(c) Assuming the assignable cause of variations have been found,construct a control chart that can be used to monitor thenon-conforming proportion on future days of the process.
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