A dataset concerning vital capacity, which is the maximal amount of air, that can be exhaled after a maximal inhalation.

In the dataset, the variable `vital.capacity` has been measured on 84 workers in the cadmium industry.

We also have the factor `exposure` with 3 levels, indicating the level of cadmium exposure:

• A: None
• B: Less than 10 years
• C: More than 10 years