*Control Chart for Attribute There are 20 subgroups given，and after calcute the UCL and LCL, all subgroups are out of co

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answerhappygod
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*Control Chart for Attribute There are 20 subgroups given，and after calcute the UCL and LCL, all subgroups are out of co

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*Control Chart for Attribute
There are 20 subgroups given，and after calcute the UCL and LCL, all subgroups are out of control. And the question state that subgroup 5 has new operator. So,
Option A: Eliminate the subgroup 5 since has assignable cause eventhough all subgroup are out of control.
Option B: No need to eliminate any point eventhough subgroup 5 has assignable cause since all subgroup have already out of control.
Which one is correct?
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