Variables Control Charts Thickness X-bar UCL = 0. 2527, Mean = 0.2500, LCL = 0. 2473 (n = 4) UCL -- UCLx 0 . 252 0 . 251 Mean 0 . 250 0 . 249 0 . 248 LCL - - -- LCLX Range UCL = 0. 0084, Mean = 0. 0037, LCL = 0 (n = 4) UCL --- UCLR 0 . 008 0. 007 0. 006 0 . 005 0. 004 Mean 501 0. 003 MAN 0. 002- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 FIGURE P6.2 Problem 13 wafer. Next, the circuit pattern is ex