The center line (p-bar) for a p-chart is 0.50 with an UCL = 0.70 and a LCL = 0.35.The results of the next eight sample means are 0.45, 0.60, 0.39, 0.44, 0.48, 0.53, 0.54, and 0.61.What would you do?
A)Nothing; the process is in control.
B)increase the sample size to get a better measure.
C)investigate assignable causes because four observations are above the center line.
D)investigate assignable causes because there is a bad trend (run).

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The Answer of The center line (p-bar) for a p-chart is 0.50 with an UCL = 0.70 and a LCL = 0.35.The results of the next eight sample means are 0.45, 0.60, 0.39, 0.44, 0.48, 0.53, 0.54, and 0.61.What would you do?
A)Nothing; the process is in control.
B)increase the sample size to get a better measure.
C)investigate assignable causes because four observations are above the center line.
D)investigate assignable causes because there is a bad trend (run).

The Center Line (P-Bar) for a P-Chart Is 0