STAB22H3 Chapter Notes - Chapter 15: Umber

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31 Dec 2015
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STAB22H3 Full Course Notes
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STAB22H3 Full Course Notes
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Conditional probability: probability that takes into account a given condition. P (b a) this means the probability of b given a . To find the probability of event b given the event a: P (b a) = __p (a and b)__ Events a and b are independent if and only if the probability of b is the same when we are given that a has occurred: If p (b) p (b a) we conclude that the events are dependant. General multiplication rule: the probability of two events a and b both occurring is the probability of event a occurring multiplied by the probability of event b occurring given that event a occurs. P (a and b) = p (a) x p (b a) Multiplication rule for independent events: for two independent events a and b, the probability that both a and b occur is the product of the probabilities of the two events.

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