Using the WCGS data for middle-aged men at risk for heart disease, fit a multipredictor model for total cholesterol (chol) that includes the binary predictor arcus, which is coded 1 for the group with...

Using the WCGS data for middle-aged men at risk for heart disease, fit a multipredictor model for total cholesterol (chol) that includes the binary predictor arcus, which is coded 1 for the group with arcus senilis, a milky ring in the iris associated with high cholesterol levels, and 0 for the reference group. Save the fitted values. Now refit the model with the code for the reference group changed to 2. Compare the coefficients, standard errors, P-values, and fitted values from the two models. The WCGS data are available at http://www.biostat.ucsf.edu/ vgsm.