For a certain drilling machine of the Putnam Manufacturing Company, control limits for an x−Chart have been determined as: UCLx = 86.8 and LCLx = 83.3 (a) Sample averages for the most recent six samples, in sequential order, are 83.2, 83.9, 84.7, 85.4, 85.9, and 86.7. What should be concluded about the process average? Should some action be taken? Why or why not? (b) What would you conclude (and why) about the process average if the sample averages for the most recent six samples, in sequential order, were 85.6, 84.9, 86.2, 85.2, 85.5, and 85.1?
For a certain drilling machine of the Putnam Manufacturing Company, control limits for an x−Chart have been determined as: UCLx = 86.8 and LCLx = 83.3 (a) Sample averages for the most recent six samples, in sequential order, are 83.2, 83.9, 84.7, 85.4, 85.9, and 86.7. What should be concluded about the process average? Should some action be taken? Why or why not? (b) What would you conclude (and why) about the process average if the sample averages for the most recent six samples, in sequential order, were 85.6, 84.9, 86.2, 85.2, 85.5, and 85.1?
Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
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4. For a certain drilling machine of the Putnam Manufacturing Company, control limits for
an x−Chart have been determined as: UCLx = 86.8 and LCLx = 83.3
(a) Sample averages for the most recent six samples, in sequential order, are 83.2, 83.9,
84.7, 85.4, 85.9, and 86.7. What should be concluded about the process average?
Should some action be taken? Why or why not?
(b) What would you conclude (and why) about the process average if the sample averages
for the most recent six samples, in sequential order, were 85.6, 84.9, 86.2, 85.2, 85.5,
and 85.1?
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