Elementary Technical Mathematics
12th Edition
ISBN: 9781337630580
Author: Dale Ewen
Publisher: Cengage Learning
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Textbook Question
Chapter 15.10, Problem 1E
A certain manufacturing process has a target value of 1.20 cm and a standard deviation of 0.15 cm. A sample of nine measurements is made each hour.
a. Draw a mean control chart using data from Illustration 1.
b. Is the process out of control? If it is, at what time does the mean control chart signal lack of control?
| Hour Mean | 11.30 | 21.15 | 31.10 | 41.25 | 51.08 | 61.11 |
| Hour Mean | 71.18 | 81.15 | 91.0 | 101.12 | 111.08 | 121.16 |
| Hour Mean | 131.12 | 141.21 | 151.25 | 161.50 | 171.30 | 181.26 |
| Hour Mean | 191.29 | 201.19 | 211.26 | 221.31 | 231.17 | 241.15 |
ILLUSTRATION 1
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Chapter 15 Solutions
Elementary Technical Mathematics
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