In Problem 3.8, you used multiple linear regression analysis to conclude that urinary calcium UCa was significantly related to dietary calcium DCa and urinary sodium UNa , but not to dietary protein Dp or glomerular filtration rate Gfr . This conclusion assumes that there is no serious multicollinearity. Evaluate the multicollinearity in the set of four independent variables used in that analysis. (The data are in Table D-5, Appendix D.)
Table D-5
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