Control charts for x and R are to be established to control the tensile strength of a
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(a) Calculate the control limits for x and R .
(b) Both charts exhibit control. The specifications on tensile strength are 200 = €“ 5. What are your conclusions regarding process capability?
(c) For the above chart, find the β-risk when the true process mean is 199. X
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a b The process is not capable of meeting specification Even though the ...View the full answer
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Related Book For 
Introduction to Statistical Quality Control
ISBN: 978-1118146811
7th edition
Authors: Douglas C Montgomery
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