PROBABILITY & STATS FOR ENGINEERING &SCI
9th Edition
ISBN: 9781285099804
Author: DEVORE
Publisher: CENGAGE L
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Chapter 10.1, Problem 5E
Consider the following summary data on the modulus of elasticity (3 106 psi) for lumber of three different grades [in close agreement with values in the article “Bending Strength and Stiffness of Second-Growth Douglas-Fir Dimension Lumber” (Forest Products J., 1991: 35–43), except that the sample sizes there were larger]:
| Grade | J |
|
si |
| 1 | 10 | 1.63 | .27 |
| 2 | 10 | 1.56 | .24 |
| 3 | 10 | 1.42 | .26 |
Use this data and a significance level of .01 to test the null hypothesis of no difference in
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Chapter 10 Solutions
PROBABILITY & STATS FOR ENGINEERING &SCI
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