Probability and Statistics for Engineering and the Sciences
9th Edition
ISBN: 9781305251809
Author: Jay L. Devore
Publisher: Cengage Learning
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Chapter 12.3, Problem 32E
Exercise 16 of Section 12.2 gave data on x = rainfall volume and y = runoff volume (both in m3). Use the accompanying Minitab output to decide whether there is a useful linear relationship between rainfall and runoff, and then calculate a confidence interval for the true average change in runoff volume associated with a 1 m3 increase in rainfall volume.
The regression equation is
runoff = −1.13 + 0.827 rainfall
| Predictor | Coef | Stdev | t-ratio | P |
| Constant | −1.128 | 2.368 | −0.48 | 0.642 |
| rainfall | 0.82697 | 0.03652 | 22.64 | 0.000 |
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Chapter 12 Solutions
Probability and Statistics for Engineering and the Sciences
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