statistics: relative frequency from contingency table  TOPIC_SOLVED

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statistics: relative frequency from contingency table

Postby k281127 on Tue May 19, 2009 12:04 am

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.
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Re: statistics: relative frequency from contingency table  TOPIC_SOLVED

Postby FWT on Tue May 19, 2009 2:13 am

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.
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