A study of physicians revealed that the proportion of people with lung cancer and smokers is 0.00140 and non smokers is 0.00010. People with heart disease and smokers is 0.00669 and non smokers is 0.00413.

a. state the association of smoking with lung cancer and with heart disease, using the difference of proportions, the relative risk and the odds ratio. What do they mean?

b. Which response (lung cancer or heart disease) is more strongly related to cigarette smoking in terms of the reduction in deaths that could occur with an absence of smoking?