The data in the file P20_06.xlsx consist of 25 subsamples of 4 observations each on the lengths

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The data in the file P20_06.xlsx consist of 25 subsamples of 4 observations each on the lengths of particular bolts manufactured for use in large aircraft. The target length of these bolts is 37 centimeters.

a. Generate and interpret X and R charts for the given data. Does this production process appear to be in control?

b. Are there any other indications that the given process may be out of control? If so, explain.

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Business Analytics Data Analysis and Decision Making

ISBN: 978-1305947542

6th edition

Authors: S. Christian Albright, Wayne L. Winston

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