If a sample point plotted on a control chart is outside the control limits
A)the evidence indicates the process is in control.
B)the evidence indicates the process is out of control.
C)the evidence is inconclusive.
D)None of these answer choices is correct.

Question

Quizplus · Accepted Answer

If a sample point is plotted outside the control limits, it is an indication that the process is out of control and there may be some special cause variability present. Hence, option B is the correct choice. Option A is incorrect as it suggests that the process is in control, which is not the case when points are outside the control limits. Option C is also incorrect as the evidence of a point outside the control limit clearly indicates a problem. Option D is incorrect as one of the answer choices must be correct.

If a Sample Point Plotted on a Control Chart Is