A manufacturing company produces cylindrical tubes for engines that are specified to be 1.20 centimeters thick.As part
Question:
A manufacturing company produces cylindrical tubes for engines that are specified to be 1.20 centimeters thick.As part of the company's statistical quality-control effort, random samples of four tubes are taken each hour. The tubes are measured to determine whether they are within thickness tolerances. Shown here are the thickness data in centimeters for nine samples of tubes. Use these data to develop an chart and an R chart.
Comment on whether or not the process appears to be in control at thispoint.
Transcribed Image Text:
Sample Sample 2 Sample 3 Sample 4 Sample 5 1.21 1.18 1.17 1.20 1.22 1.19 1.20 1.23 1.20 1.20 1.22 1.20 1.16 1.17 1.20 1.16 1.24 1.20 1.21 1.18 Sample 6 1.19 1.21 1.21 1.20 Sample 7 1.24 1.17 1.18 1.19 Sample 8 1.17 1.23 1.22 1.16 Sample 9 1.22 1.17 1.16 1.19
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Related Book For
Business Statistics for Contemporary Decision Making
ISBN: 978-0470910184
6th Edition
Authors: Ken Black
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