## statistics: relative frequency from contingency table

Standard deviation, mean, variance, z-scores, t-tests, etc.
k281127
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### statistics: relative frequency from contingency table

A sample of 232 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 contingency table below:

`contingency table: Parents' smoking habits                   Both       Only one   Neither                  parents    parent     parent                  smoke      smokes     smokes  Smokes        |    50    |    19    |   37   |Does not smoke  |    39    |    43    |   44   |`

What is the relative frequency of individuals in the sample who do not smoke?
the answer must be rounded to at least two decimal places.

FWT
Posts: 132
Joined: Sat Feb 28, 2009 8:53 pm

### Re: statistics: relative frequency from contingency table

Do the divsions to find the percentages. Of 232, 50 who have parents that smoke also smoke: 50/232=0.215517 so use 21.55%

Do the others the same way.