Thirty samples each of size 7 have been collected to establish control over a process. The following

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Thirty samples each of size 7 have been collected to establish control over a process. The following data were collected:

(a) Calculate trial control limits for the two charts.
(b) On the assumption that the R chart is in control, estimate the process standard deviation.
(c) Suppose an s chart were desired. What would be the appropriate control limits and center line?

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Introduction to Statistical Quality Control

ISBN: 978-1118146811

7th edition

Authors: Douglas C Montgomery

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Question Posted: Nov 06, 2015 03:14 AM

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Thirty samples each of size 7 have been collected to establish control over a process. The following

Question:

ΣΧ, 2700 and LR,-120 2700 and Σ R 120

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a b c X ...View the full answer

Introduction to Statistical Quality Control

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