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 ...

Accordingly, 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 ...

This example shows how you can apply tests for special causes to make np charts more sensitive to special causes of variation. The following statements create a SAS data set named CIRCUIT3, which ...