Question: A Quality Analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to

A Quality Analyst wants to construct a control

A Quality 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 random samples, with the following results: MACHINE #1 #2 #3 #4 TOTAL DEFECTIVES 23 15 29 13 If upper and lower control limits were set as 0.028 and 0.010, which machine(s), if any, appear(s) to be out-of-control for process proportion of defectives? Select one: a. Machines #3 and #4 b. None of the machines. c. Machine #4 only d. Machine #3 only e. Machines #2 and #3

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