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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
To construct a p-chart for a manufacturing process, 25 samples of size 200 were drawn from the process. The number of defectives in each sample is listed below

a. Calculate the proportion defective in each sample.
b. Calculate and plot
and the upper and lower control limits for the p-chart.
c. Calculate and plot the A, B, and C zone boundaries on the p-chart.
d. Plot the sample proportions on the p-chart and connect them with straight lines.
e. Use the pattern-analysis rules 1-4 for detecting the presence of special causes of variation (Figure 11.21) to determine whether the process is out of control.
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