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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