8.58 Bronze castings are controlled for copper content. Ten samples of five specimens each gave the measurements

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8.58 Bronze castings are controlled for copper content.

Ten samples of five specimens each gave the measurements on percentage of copper that are listed in table on the next page.

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a Construct control limits for the mean percentage of copper by using the sample ranges.
b Would you use the limits in part

(a) as control limits for future samples? Why or why not?
c Construct control limits for process variability.
Does the process appear to be in control with respect to variability?

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Probability And Statistics For Engineers

ISBN: 9781133006909

5th Edition

Authors: Richard L Scheaffer, Madhuri Mulekar, James T McClave, Cecie Starr

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Question Posted: Sep 19, 2024 02:22 PM

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8.58 Bronze castings are controlled for copper content. Ten samples of five specimens each gave the measurements

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Sample 1 12345678 82 888 90 2 Specimen 3 4 5 84 80 86 83 91 94 90 89 86 84 87 83 80 92 91 89 91 90 84 82 83 81 84 82 81 83 84 81 80 80 79 83 82 79 83 84 9 81 84 85 10 81 92 94 79 222 82 82 79 86 80

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Probability And Statistics For Engineers

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