Question: Compute the limits for x and s charts. IS the process still in control? stDev (function) s-bar (mean of stdev) LCL (B3xs-bar) UCL (s-bar*B4) 1

Compute the limits for x and s charts. IS the process still in control?

stDev (function) s-bar (mean of stdev) LCL (B3xs-bar) UCL (s-bar*B4)
1 68.51 68.46 68.54 68.34 68.46 68.46
2 68.94 68.2 68.54 68.56 68.7 68.7
3 68.66 68.44 68.55 68.77 68.7 68.64
4 68.49 68.94 68.56 68.62 68.69 68.56
5 68.64 68.63 68.62 68.32 68.34 68.24
6 68.34 68.42 68.99 68.02 68.03 68.47
7 68.99 68.94 68.95 68.95 68.94 68.97
8 68.92 68.91 68.97 68.93 68.96 68.95
Mean
n=
B3=
B4=
From Table 11-3

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