Question: A manager has to develop a control chart for determining whether three homogenous processes are in control. Accordingly she sampled four units of output from

  1. A manager has to develop a control chart for determining whether three homogenous processes are in control. Accordingly she sampled four units of output from each process with the following results. Process 1-17,15,15,17; Process 2-16,25,18,25; Process 3-23,24,23,22, which process(s) , if any appear(s) to have an out of control process mean?
    1. 22 and 16
    2. 23.29 and 16.71
    3. 23.5 and 16. 5
    4. 23.16 and 16.84
    5. 24.1 and 15.75

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