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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 1,000 units of output from each machine in random samples, with the following results
Machine Total Defectives
#123
#215
#329
#413
What are the control chart upper and lower control limits for an alpha risk of .05?
Group of answer choices
.0272 and .0128
.0287 and .0113
.029 and .013
.0303 and .0097
.0332 and .0068

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