Question: 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 Quality Analyst wants to construct a control

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 15 17 16 23 2 3 25 251 241 23 Using the factors for three sigma control limits, what are the sample range (R) chart upper and lower control limits? Multiple Choice 11.14 and 0 9.88 and 0 8.66 and 0 O 4.94 and 0 O 4.33 and 0

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