In analyzing an X bar chart, which of the following conditions indicates that a

Question

In analyzing an X bar chart, which of the following conditions indicates that a process step is out of control?

Any point that falls either below the lower control limit or above the upper control limit

Ten consecutive points that are either all above, or all below, the mean line

Ten consecutive points that trend either upward or downward

All of the above

None of the above

Any point that falls either below the lower control limit or above the upper control limit

Ten consecutive points that are either all above, or all below, the mean line

Ten consecutive points that trend either upward or downward

All of the above

None of the above

Explanation / Answer

a.Any point that falls either below the lower control limit or above the upper control limit

In analyzing an X bar chart, Any point that falls either below the lower control limit or above the upper control limit is the condition indicates that a process step is out of control.

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