Prepare a quality control chart from the following sequential, weekly test data from the manufacture of Cee Brirol computer tape storage devices. The desired level of performance is 1.5. The upper control limit is 2.1, (LO 2,6)

and the lower control limit is 1.2. What does this chart indicate? ;

Week Average Test Performance 510) y Lido bldxicbh bed cen Rae ae eRe ee RSE Pet eee eae Ue

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