Aquality analyst wants to construct a control chart for


Aquality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to a particular quality attribute.

Accordingly, she inspected 1,000 units of output from each machine in random samples, with the following results: Machine, Total Defects 1,23 2,15 3,29 4,13 What are the control chart upper and lower control limits for z = 2?

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Operation Management: Aquality analyst wants to construct a control chart for
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