Statistics for Engineers and Scientists
4th Edition
ISBN: 9780073401331
Author: William Navidi Prof.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 8, Problem 9SE
Refer to Exercise 2 in Section 8.2.
- a. Using each of the three models in turn, predict the NOx emission when Speed = 1500, Torque = 400, and HP = 150.
- b. Using each of the three models in turn, predict the NOx emission when Speed = 1600, Torque = 300, and HP = 100.
- c. Using each of the three models in turn, predict the NOx emission when Speed = 1400, Torque = 200, and HP = 75.
- d. Which model or models appear to be the best? Choose one of the answers, and explain.
- i. The model with Speed and Torque as independent variables is the best.
- ii. The model with Speed and HP as independent variables is the best.
- iii. The model with Speed, Torque, and HP as independent variables is the best.
- iv. The model with Speed and Torque and the model with Speed and HP are about equally good: both are better than the model with Speed, Torque, and HP.
- v. The model with Speed and Torque and the model with Speed, Torque, and HP are about equally good; both are better than the model with Speed and HP.
- vi. The model with Speed and HP and the model with Speed, Torque, and HP are about equally good; both are better than the model with Speed and Torque.
- vii. All three models are about equally good.
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Chapter 8 Solutions
Statistics for Engineers and Scientists
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