Exercise and Smoking A study of the effects of exercise by women included results summarized in the table (based on data from “Physical Activity and Coronary Heart Disease in Women” by Lee, Rexrode, Cook, Manson, and Buring, Journal of the American Medical Association, Vol. 285, No. 11). Exercise values are in kilocalories of physical activity per week. Use a 0.05 significance level to test the claim that the level of smoking is independent of the level of exercise.

10-3 Beyond the Basics