In the general equation of UCL of a control chart, for any chart, whic – McqOptions

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1.	In the general equation of UCL of a control chart, for any chart, which of these is used as the estimator of ?
A.	( bar{x} )
B.	( bar{R} )
C.	( bar{ bar{x}} )
D.	( bar{ bar{R}} )
Answer» D. ( bar{ bar{R}} )

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