GROUPING = 1

LSCX = UCLX = upper control limit for X Chart = Xm + A2 * R
LICX = LCLX = lower control limit for X Chart = Xm - A2 * R where Xm = X

LSCX = UCLX = upper control limit for X Chart = Xm + A2 * R
LICX = LCLX = lower control limit for X Chart = Xm - A2 * R where Xm = X