The average number of points that must be plotted before an out-of-control point is plotted on an Individuals control chart?

The average number of points that must be plotted before an out-of-control point is plotted on an Individuals control chart? Correct Answer ARL

The average number of points that must be plotted before a point indicating an out-of-control situation is plotted, is called the Average run length of any control chart.
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