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Question 5

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Management
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Question 5
A) x
= ( 156.9 + 153.2 + 153.6 + 155.5 + 156.6)/ 5 = 155.16
r = (4.2+4.6+4.1+5.0+4.5)/5 = 4.48
B) UCL = x
+A2 r
= 155.16 +0.31*4.48
=156. 55
LCL = x
- A2 r
= 153. 77
UCL= D
4
r
R= 1.78*4.48
= 7.97
LCL= D3 r
R= 0.22 * 4.48
= 0.99

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Question 5 A) x̅ = ( 156.9 + 153.2 + 153.6 + 155.5 + 156.6)/ 5 = 155.16 r̄ = (4.2+4.6+4.1+5.0+4.5)/5 = 4.48 B) UCL = x̅ +A2 r̄ = 155.16 +0.31*4.48 =156. 55 LCL = x̅ - A2 r̄ = 153. 77 UCL= D4 r̄ R= 1.78*4.48 = 7.97 LCL= D3 r̄ R= 0.22 * 4.48 = 0.99 C) The process is not in statistical control. 156.9 is above 156.55 (UCL) Question 5 ...
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