STATISTICS FOR ENGR.+SCI-W/ACCESS
4th Edition
ISBN: 9781260036107
Author: Navidi
Publisher: MCG
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Textbook Question
Chapter 9.3, Problem 16E
The article referred to in Exercise 15 also presents measurements of Young’s modulus for side members of T-braced assemblies. The following table presents data in which the factors are the length of the side member and its method of attachment. There were 10 replications for each combination of factors. The data (in kN/mm2) are consistent with the means and standard deviations given in the article.
Attachment | Length | Young’s Modulus | |||||||||
Adhesive | Quarter | 9.56 | 10.67 | 8.82 | 8.40 | 9.23 | 8.20 | 1023 | 9.58 | 7.57 | 8.05 |
Adhesive | Half | 8.74 | 9.24 | 10.77 | 9.10 | 8.08 | 11.14 | 10.00 | 9.17 | 9.79 | 8.13 |
Adhesive | Full | 9.84 | 9.80 | 8.31 | 7.37 | 10.12 | 9.18 | 8.93 | 8.65 | 7.89 | 9.07 |
Nail | Quarter | 10.24 | 9.38 | 9.38 | 7.48 | 9.23 | 9.64 | 8.45 | 8.12 | 8.86 | 8.07 |
Nail | Half | 9.84 | 9.34 | 9.64 | 8.21 | 10.43 | 9.48 | 7.46 | 9.51 | 10.20 | 9.66 |
Nail | Full | 7.96 | 8.32 | 8.73 | 9.37 | 9.12 | 7.98 | 9.84 | 8.89 | 10.10 | 8.07 |
- a. Compute all main effects and interactions.
- b. Construct an A NOVA table. You may give
ranges for the P-values. - c. Is the additive model plausible? Provide the value of a test statistic and the P-value.
- d. Can the effect of attachment method (nail versus adhesive) on Young’s modulus be described by interpreting the main effects of attachment method? If so, interpret the main effects. If not, explain why not.
- e. Can the effect of side member length on Young’s modulus be described by interpreting the main effects of side member length? If so, interpret the main effects, using multiple comparisons at the 5% level if necessary. If not, explain why not.
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STATISTICS FOR ENGR.+SCI-W/ACCESS
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