Question: Apply ridge regression to the Hald cement data in Table B.21. a. Use the ridge trace to select an appropriate value of k. Is the
Apply ridge regression to the Hald cement data in Table B.21.
a. Use the ridge trace to select an appropriate value of k. Is the fi nal model a good one?
b. How much infl ation in the residual sum of squares has resulted from the use of ridge regression?
c. Compare the ridge ยท regression model with the two - regressor model involving x1 and x2 developed by all possible regressions in Example 9.1
.
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