Consider the following data from Exercise 7.61 on page
Chapter , Problem 7.74(choose chapter or problem)
Consider the following data from Exercise 7.61 on page 342. y (wear) x1 (oil viscosity) x2 (load) 193 1.6 851 230 15.5 816 172 22.0 1058 91 43.0 1201 113 33.0 1357 125 40.0 1115 (a) Estimate 2 using multiple regression of y on x1 and x2. (b) Compute predicted values, a 95% confidence interval for mean wear, and a 95% prediction interval for observed wear if x1 = 20 and x2 = 1000.
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