Question: q56 A Quality Analyst wants to construct a control chart for determining whether three machines, all producing the same product, are under control with regard

q56 A Quality Analyst wants to construct a

q56 A Quality Analyst wants to construct a

q56

A Quality Analyst wants to construct a control chart for determining whether three machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results: Machine Measurements #1 17 15 15 17 # 2 16 25 18 25 23 24 23 22 What is the estimate of the process mean for whenever it is under control? #*# # 3 What is the sample average range based upon this limited sample? What are the x-bar chart upper and lower control limits

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