What does usage of s instead of /d2 in the confidence intervals indica

1.	What does usage of s instead of /d₂ in the confidence intervals indicate?
A.	s=1
B.	Process must be in control
C.	Process may be in the out-of-control state
D.	d<sub>2</sub><1
Answer» C. Process may be in the out-of-control state

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