Question

You want to determine the control lines for a "p" chart for quality control purposes. If the total number of defects from all samples is 560, the number of samples is 70 and the sample size is 80, which of the following would be the standard deviation used in developing the control lines?
A. 0.9000
B. 0.4556
C. 0.0335
D. 0.0011
E. 0.0112

Answer

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