1.

The estimation of the process standard deviation for any individuals control chart is expressed as ____ in the terms of sample standard deviation.

A. ( widehat{ _2}= frac{s}{c_4} )
B. ( widehat{ _2}= frac{s}{c_1} )
C. ( widehat{ _2}= frac{s}{c_2} )
D. ( widehat{ _2}= frac{s}{c_3} )
Answer» B. ( widehat{ _2}= frac{s}{c_1} )


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