Mathematical Statistics with Applications
7th Edition
ISBN: 9780495110811
Author: Dennis Wackerly, William Mendenhall, Richard L. Scheaffer
Publisher: Cengage Learning
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Chapter 11, Problem 96SE
A study was conducted to determine whether a linear relationship exists between the breaking strength y of wooden beams and the specific gravity x of the wood. Ten randomly selected beams of the same cross-sectional dimensions were stressed until they broke. The breaking strengths and the density of the wood are shown in the accompanying table for each of the ten beams.
- a Fit the model Y = β0 + β1 x + ε.
- b Test H0: β1 = 0 against the alternative hypothesis, Ha: β1 ≠ 0.
- c Estimate the mean strength for beams with specific gravity .590, using a 90% confidence interval.
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Chapter 11 Solutions
Mathematical Statistics with Applications
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