ECON 250 Chapter Notes - Chapter 5: Binomial Distribution

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ECON 250 Full Course Notes
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ECON 250 Full Course Notes
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Rule 1: 0 < p(a) < 1 for any event a. Rule 4: p(a or b) = p(a) + p(b) This is the addition rule and only occurs if a and b are disjoint events: disjoint events occur if the probability that one or the other of two events a and b occurs when. Two events a and b are independent if knowing that one occurs does not change the probability that the other occurs: if a and b are independent, p(a and b) = p(a)p(b) For any two events a and b, P(a or b) = p(a) + p(b) p(a and b) The probability that both of two events a and b happen together can be found by. P(a and b) = p(a) p(b | a) Here p(b | a) is the conditional probability that b occurs, given that information a occurs. When p(a) > 0, the conditional probability of b, given a, is:

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