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A quality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are in control with regard to
A quality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are in control with regard to a particular quality attribute. Accordingly, she inspected units of output from each machine in random samples, with the following results
Machine Total Defectives
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What are the control chart upper and lower control limits for an alpha risk of
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