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Control charts for X-bar and R are maintained for the tensile strength of fibers used in composite materials. The specifications are 440±40. After 25 samples of size n=10 are analyzed, we find that: 25 25 Xi = 12,870 Rị : = 1,350 i=1 i=1 What are the limits of the R chart? O UCL=65.54 and LCL=2.56 O UCL=74.97 and LCL=9.41 UCL=79.96 and LCL=10.03 UCL=95.96 and LCL=12.04 UCL=72.82 and LCL=2.85

Control charts for X-bar and R are maintained for the tensile strength of fibers used in composite materials. The specifications are 440±40. After 25 samples of size n=10 are analyzed, we find that: 25 25 Xi = 12,870 Rị : = 1,350 i=1 i=1 What are the limits of the R chart? O UCL=65.54 and LCL=2.56 O UCL=74.97 and LCL=9.41 UCL=79.96 and LCL=10.03 UCL=95.96 and LCL=12.04 UCL=72.82 and LCL=2.85

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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Control charts for X-bar and R are maintained for the tensile strength of fibers used in composite materials. The specifications are 440+40. After 25 samples of size n=10 are analyzed, we find that: 25 25 X¡ = 12,870 Ri = 1,350 i=1 What are the limits of the R chart? UCL=65.54 and LCL=2.56 UCL=74.97 and LCL=9.41 UCL=79.96 and LCL=10.03 UCL=95.96 and LCL=12.04 UCL=72.82 and LCL=2.85
Transcribed Image Text:Control charts for X-bar and R are maintained for the tensile strength of fibers used in composite materials. The specifications are 440+40. After 25 samples of size n=10 are analyzed, we find that: 25 25 X¡ = 12,870 Ri = 1,350 i=1 What are the limits of the R chart? UCL=65.54 and LCL=2.56 UCL=74.97 and LCL=9.41 UCL=79.96 and LCL=10.03 UCL=95.96 and LCL=12.04 UCL=72.82 and LCL=2.85
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