Question: Based on the Western Electric rules, is the process mean in control? If not, when is it first detected to be out of control? Multiple

Based on the Western Electric rules, is the process mean in control? If not, when is it first detected to be out of control?
Multiple Choice
The process mean is out of control for the first time on sample 8.
The process mean is out of control for the first time on sample 11.
The process mean is out of control for the first time on sample 7.
The process mean is out of control for the first time on sample 19.
The process mean is in control.
Based on the Western Electric rules, is the process mean in

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