In Problem 4.3, you analyzed the relationship between ammonium ion A and urinary anion gap Uag . There was a suggestion of a quadratic relationship. A. Evaluate the extent of the structural...

In Problem 4.3, you analyzed the relationship between ammonium ion A and urinary anion gap Uag . There was a suggestion of a quadratic relationship. A. Evaluate the extent of the structural multicollinearity between Uag and in this model. B. What effect does centering the data have in this analysis and why?