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Compute the limits for x and s charts. IS the process still in control? stDev (function)...

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
business   Operations-Management   
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Answer #1

Note here there are 8 groups and n =6

We would need Excel to solve this  

K4 X fic =$B$14-((3*$B$15/SQRT($B$13))) A B C D E K L M. 2 LCL UCL 1 moF 68.51 68.94 68.66 68.49 68.64 68.34 68.99 68.92 68.4

clipboard Font s Alignment Numbers L4 X ✓ fic =$B$14+(3*$B$15/SQRT($B$13))) A B C D E F G H M I stDev J s-bar (function) (mea








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