1.

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

A. \(\widehat{σ_2}=\frac{s}{c_4}\)
B. \(\widehat{σ_2}=\frac{s}{c_1}\)
C. \(\widehat{σ_2}=\frac{s}{c_2}\)
D. \(\widehat{σ_2}=\frac{s}{c_3}\)
Answer» B. \(\widehat{σ_2}=\frac{s}{c_1}\)


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