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Ch18n19Def - P A and B = P A P B Independence means that...

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STAT 110 Chapter 18 and 19 Definitions probability model – describes all possible outcomes and says how to assign probabilities to any collection of outcomes sample space – collection of unique outcomes of a random circumstance event – a collection of outcomes Probability Rules 1. Any probability is a number between 0 and 1. 2. All possible outcomes together must have probability 1. 3. The probability that an event does not occur is 1 minus the probability that the event does occur. 4. If two events have no outcomes in common, the probability that one or the other occurs is the sum of their individual probabilities.
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