 
			 
			MCQOPTIONS
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				| 1. | X bar chart monitors __________ | 
| A. | Between-sample variability | 
| B. | Within-sample variability | 
| C. | Neither between-sample nor within-sample variability | 
| D. | Both between-sample variability and within-sample variability | 
| Answer» B. Within-sample variability | |