Question: 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 800 units of output from each machine in random samples, with the following results: Compute the Control Limits for the following data, assuming a 95 percent Confidence Level.

A quality analyst wants to construct a control

Machine Total Defectives #1 #2 40 35 29 #3 #4 23

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