The same graphite manufacturer from Exercise 21 uses an alternative process to make rolls. For this process
Question:
a) Using the same mean and standard deviation as given in Exercise 21 create an X chart for these samples.
b) Using the mean and standard deviation as in Exercise 21, create an R chart for these samples.
c) Is the company’s process for making flexible graphite sheets in control?
d) Are all of these rolls within the specification limits?
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Related Book For
Business Statistics
ISBN: 9780321925831
3rd Edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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