ASQ
CSSBB · Question #64
A set of data from a process has 8 readings per sample and 50 samples. The mean of the 50 sample means is 12.62. The mean of the 50 ranges is 0.18. Find the control limits for the xbar chart.
The correct answer is A. 12.55 and 12.69. See the full explanation below for the reasoning.
Control Phase
Question
A set of data from a process has 8 readings per sample and 50 samples. The mean of the 50 sample means is 12.62. The mean of the 50 ranges is 0.18. Find the control limits for the xbar chart.
Options
- A12.55 and 12.69
- B12.11 and 13.13
- C12.54 and 12.70
- Dnone of the above
How the community answered
(29 responses)- A79% (23)
- B3% (1)
- C14% (4)
- D3% (1)
Topics
#X-bar chart#control limits#SPC#control chart constants
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