Multiple Choice
A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results
What are the x-bar chart three-sigma upper and lower control limits?
A) 22 and 18
B) 23.29 and 16.71
C) 23.5 and 16.5
D) 23.16 and 16.84
E) 24 and 16
Correct Answer:
Verified
Correct Answer:
Verified
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