Out-Of-Control Indicators May Include a Number of Conditions

Multiple Choice

Out-of-control indicators may include a number of conditions.What is not one of these?

A) At least 8 upward (or downward) consecutive changes
B) At least 8 consecutive points above (or below) the centerline
C) At least 1 point beyond two standard deviations from the centerline
D) At least 4 of 5 consecutive points beyond one standard deviation from the centerline