The Central Line on a P- Chart Is 0

question 22

Multiple Choice

The central line on a p- chart is 0.50 with an UCL of 0.65 and a LCL of 0.35. The results of the next six samples are 0.60, 0.37, 0.45, 0.48, 0.53, and 0.62. What should you do?

• A) Explore the assignable causes because three observations are above the central line.
• B) Explore assignable causes because there is a run.
• C) Increase the sample size to get a better measure.
• D) Nothing; the process is behaving as expected.

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