The data source did not include units for alcohol and adiposity; however, we have provided units of measurement for ease of discussion in our examples.
Original data reference: Rossouw, J. E., J. P. Du Plessis, A. J. Benadé, P. C. Jordaan, J. P. Kotzé, P. L. Jooste, and J. J. Ferreira. 1983. Coronary risk factor screening in three rural communities. South African Medical Journal 64: 430–436.
Source: Hastie, T., R. Tibshirani, and J. Friedman. 2009. The Elements of Statistical Learning: Data Mining, Inference, and Prediction. 2nd ed. New York: Springer.