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Final total quality management GSCM 326

Twenty samples of subgroup size 6 (n = 7) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals 6.4.

Factors for calculating control limits

n                 A2      D3             D4

2              1.880     0              3.267

3              1.023     0              2.574

4              0.729     0              2.282

5              0.577     0              2.114

6              0.483     0              2.004

7              0.419     0              1.924

 

Note: i need the answer step by step.





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