When Using a Control Chart, a Manager Does Not Investigate

Multiple Choice

When using a control chart, a manager does not investigate the activity when

A) most observations are outside the preset range.
B) all observations are outside the preset range.
C) all observations are within the range of preset standard deviations.
D) most observations are within the range of 2 standard deviations.
E) all observations are determined to be non-random.