p expected proportion of nonconforming items produced by the process A lower probability limit for X i can be determined using the fact that Refer to Johnson, Kotz, and Kemp (1992). This assumes that ...
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The Complete Guide to Understanding Control Charts: How They Work, and Which to UseAccordingly, these charts come into play when the number of samples in each sampling period is essentially the same. Use an np-chart when identifying the total count of defective units (the unit ...
which is introduced at "Creating np Charts from Count Data". The expected proportion of failing circuits is known to be p 0 =0.02. The following statements create an np chart, shown in Output 37.2.1, ...
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