Aussies' fluoride smile is best



  1. The use of "average" and "two-fifths" in the first paragraph to describe children with one or no decayed teeth is a bit unusual. What percentage or fraction do you think would represent the "average group"?
  2. Sketch what a pie chart might look like if it were representing the percentage of children with no decayed teeth, one, and more than one.
  3. Write a conditional probability statement which expresses the relationship of tooth decay and fluoridated water as Pr(A|B) = n x Pr(A|C).
    Carefully define A, B and C.


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