Schoolgirls are smokers, drinkers



  1. There are many conditional statements with relative likelihood presented in this article. Choose two and write conditional probability statements which express the relationships claimed.
  2. Devise a 2 x 2 table accounting for the 1400 girls in the survey categorised by whether they smoked or not and by whether they drank or not. (Two interpretations of the percentages given are possible so explain your assumptions carefully)
  3. Determine if the events "smoked" and "drank" are independent events.



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