Calculating the lower control limit
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The manager of an assembly line took 5 samples each with 6 observation under ideal conditions to develop control limits for an X bar chart The mean and range of each sample is shown in the table below:
What would be the 3 standard deviation lower control limit?
Number Mean Range
1 2.18 0.33
2 2.12 0.38
3 1.86 0.4
4 1.98 0.38
5 2.02 0.35
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Solution describes the steps to calculate 3-standard deviation lower control limit in the given case.
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Education
- BEng (Hons) , Birla Institute of Technology and Science, India
- MSc (Hons) , Birla Institute of Technology and Science, India
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