Ex= 107.5 and Σ MR = 12.0 Assuming that the process is in control, find: (A) The process upper natural tolerance limit= (B) The process lower natural tolerance limit=

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Measurements are taken from a manufacturing process at regular intervals. A normally distributed quality characteristic x is measured and
values of the moving range are calculated. After 25 measurements, we have:
Σ MR = 12.0
E x = 107.5 and
Assuming that the process is in control, find:
(A) The process upper natural tolerance limit=
(B) The process lower natural tolerance limit=
Transcribed Image Text:Measurements are taken from a manufacturing process at regular intervals. A normally distributed quality characteristic x is measured and values of the moving range are calculated. After 25 measurements, we have: Σ MR = 12.0 E x = 107.5 and Assuming that the process is in control, find: (A) The process upper natural tolerance limit= (B) The process lower natural tolerance limit=
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