3/7/00 lesson plan
Intent of lesson: to practice different ways of thinking about conditional probability statements.
Relate discussion to previous assignments: US demographics, Vandy student population, HIV drug test situations.
Be able to do 2 things:
Notation P[A|B] denotes a conditional probability statement:
"Given condition B, what is probability of A?" or "What is probability of A given condition B?" (explain convention of this notation).
Ways to think about what this means:
If youre thinking of a population and of how it is composed, then think of P[A|B] as "if you restrict your attention to sub-population B, then P[A|B] is the fraction of the Bs that are As"
If youre thinking of collecting a sample by drawing elements at random one at a time from population, think either of