An Introduction to Mathematical Statistics and Its Applications (6th Edition)
6th Edition
ISBN: 9780134114217
Author: Richard J. Larsen, Morris L. Marx
Publisher: PEARSON
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Chapter 12.4, Problem 1Q
The cathode warm-up time (in seconds) was determined for three different types of X-ray tubes using fifteen observations of each type. The results are listed in the following table.
| Warm-Up Times (sec) | |||||
| Tube Type | |||||
| ABC | |||||
| 19 | 27 | 20 | 24 | 16 | 14 |
| 23 | 31 | 20 | 25 | 26 | 18 |
| 26 | 25 | 32 | 29 | 15 | 19 |
| 18 | 22 | 27 | 31 | 18 | 21 |
| 20 | 23 | 40 | 24 | 19 | 17 |
| 18 | 29 | 22 | 32 | 19 | 18 |
| 35 | 18 | 18 | |||
Do an analysis of variance on these data and test the hypothesis that the three tube types require the same average warm-up time. Include a pair of orthogonal contrasts in your ANOVA table. Define one of the contrasts so it tests
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Chapter 12 Solutions
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
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