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Test 2 Notes - Stats Test 2 Notes Classical Probability of...

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Stats Test 2 Notes Classical Probability - # of outcomes in the event/ # of outcomes in sample space Empirical Probability – frequency of class/ total frequencies in distribution Addition Rule (OR problems)– P (A and B) = P (A) + P (B) – P (A and B) Mutually Exclusive Events – Events are mutually exclusive if they cannot occur at the same time (they have no outcomes in common) Mutually Inclusive Events - Events are mutually inclusive if they can occur at the same time (they have outcomes in common) Multiplication Rule (AND problems) – P (A and B) = P (A) * P (B|A) Independent Outcomes – Events A and B are independent if the fact that a occurs or does not occur has no effect on the probability of B occurring P (A and B) = P(A) * P(B) Dependent Outcomes – When the occurrence of the first outcome affects the occurrence of the next outcome HINTs: all, every, each, both Complement Steps: 1) Define the event 2) Define the complement of the event 3) Find the probability of the complement 4) Find the probability of the event
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