PROBABILITY & STATS FOR ENGINEERING &SCI
9th Edition
ISBN: 9781285099804
Author: DEVORE
Publisher: CENGAGE L
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Chapter 10.1, Problem 8E
A study of the properties of metal plate-connected trusses used for roof support (“Modeling Joints Made with Light-Gauge Metal Connector Plates,” Forest Products J., 1979: 39–44) yielded the following observations on axial-stiffness index (kips/in.) for plate lengths 4, 6, 8, 10, and 12 in:
| 4: | 309.2 | 409.5 | 311.0 | 326.5 | 316.8 | 349.8 | 309.7 |
| 6: | 402.1 | 347.2 | 361.0 | 404.5 | 331.0 | 348.9 | 381.7 |
| 8: | 392.4 | 366.2 | 351.0 | 357.1 | 409.9 | 367.3 | 382.0 |
| 10: | 346.7 | 452.9 | 461.4 | 433.1 | 410.6 | 384.2 | 362.6 |
| 12: | 407.4 | 441.8 | 419.9 | 410.7 | 473.4 | 441.2 | 465.8 |
Does variation in plate length have any effect on true average axial stiffness? State and test the relevant hypotheses using analysis of variance with a 5 .01. Display your results in an ANOVA table. [Hint:
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Chapter 10 Solutions
PROBABILITY & STATS FOR ENGINEERING &SCI
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