ASQ
CSSBB · Question #76
An x-bar and R chart has four part measurements per sample The control limits on the averages chart are 2.996 and 3.256. Assume the process data form a normal distribution.What is the probability…
The correct answer is B. 0.0027. See the full explanation below for the reasoning.
Control Phase
Question
An x-bar and R chart has four part measurements per sample The control limits on the averages chart are 2.996 and 3.256. Assume the process data form a normal distribution.What is the probability that the next plotted point falls outside the control limits?
Options
- A0.00135
- B0.0027
- C0.0054
- Dnone of the above
How the community answered
(37 responses)- A8% (3)
- B76% (28)
- C3% (1)
- D14% (5)
Topics
#X-bar chart#false alarm probability#control limits#normal distribution
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