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# Relative Frequency of Smoking

A sample of individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contingency table below.

Parents' smoking habits

Both parents smoke Only one parent smokes Neither parent smokes

Individual's
smoking habits
Smokes 24 30 32
Does not smoke 19 23 24

Among all the individuals in the sample, what is the relative frequency of individuals who smoke and have two parents who smoke?

#### Solution Preview

A sample of 152 individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contingency table below.

Parents' smoking habits

Both parents smoke Only one parent smokes Neither parent smokes

Individual's
smoking habits
Smokes 24 ...

#### Solution Summary

This solution uses the equation to calculate relative frequency of individuals who smoke and have two parents who smoke. All steps are shown with brief justifications.

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