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Question: using the following data and a subgroup size of 5...

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Using the following data and a subgroup size of 5:
Subgroup Average            Range
1    90                      5
2                88    1
3                89                      5
4                93                      2
5                91                      7
6    92                      4
7                87    7
8                91                      5
9                89                      4
10              90                      4
Determine the trial control limits for a Median and R control chart.

A. What are the centerlines for each portion of the chart?
B. What is the value for UCLmd, LCLmd, UCLr and LCLr?
C. Which, if any, of the above subgroups are out of control?

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