Question: Non random variation is indicated when a point is observed that is outside the control limits, or a run test produces a large z-value. What
Non random variation is indicated when a point is observed that is outside the control limits, or a run test produces a large z-value. What is this a sign of?
Select one:
a. More samples are required
b. The control limit is incorrect
c. The process is in control
d. Assignable variation
e. Excessive random variation
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