Given a set of subgrouped data, the Six Sigma Black Belt should be able to select and preqare the correct control charts and to determine if a given process is a state of statistical control.

• 译文：给出一组分组数据，六西格玛黑带应该能够选择和作出正确的控制图，并且能够确定给定过程是否处在统计控制状态。