PROBABILITY & STATS FOR ENGINEERING &SCI
9th Edition
ISBN: 9781285099804
Author: DEVORE
Publisher: CENGAGE L
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Chapter 13.4, Problem 38E
Let y = wear life of a bearing, x1 = oil viscosity, and x2 = load. Suppose that the multiple regression model relating life to viscosity and load is
Y = 125.0 + 7.75x1 + .0950x2 − .0090x1x2 + ϵ
a. What is the
b. When viscosity is 30, what is the change in mean life associated with an increase of 1 in load? When viscosity is 40, what is the change in mean life associated with an increase of 1 in load?
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Chapter 13 Solutions
PROBABILITY & STATS FOR ENGINEERING &SCI
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