Question: Q3. (14 points) A control chart is to be established on a process producing refrigerators. The inspection unit is one refrigerator, and a common chart

Q3. (14 points) A control chart is to be established on a process producing refrigerators. The inspection unit is one refrigerator, and a common chart for nonconforming is to be used. As preliminary data, 15 nonconformities were counted in inspecting 30 refrigerators. Use a control chart for nonconformities with an inspection unit n = 1 refrigerator. a) What are the 3o control limits? b) What is the a-risk for this control chart? c) What is the B-risk if the average number of defects is actually 2 (i,e., if c=2.0) ? d) Find the average run length if the average number of defects is actually 2

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