An X bar chart includes the following data: The mean of data ranges from 8.5 to 12.0 on the Y axis. The group ranges from 2 to 20 on the x axis. The upper control limit is 10.996 The average is 10.024 The lower control limit is 9.024 The mean rises above the upper control limit at approximately 16 on the x axis, and stays at or above the upper control limit to the end of the graph.

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