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### 8 Cards in this Set

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 RANDOM SAMPLE sample selected from the population by a process that ensures that (1) each possible sample of a given size has an equal chance of being selected and (2) all the members of the population have an equal chance of being selected into the sample SAMPLING WITH REPLACEMENT a method of sampling in which each member of the population selected for the sample is returned to the population before the next member is selected SAMPLING WITHOUT REPLACEMENT a method of sampling in which the members of the sample are not returned to the population before subsequent members are selected A PRIORI PROBABILITY classical viewpoint, literally means that which can be deduced from reason alone, without experience p(A) = # of events classifiable as A / total number of possible events p(A) the probability of occurrence of event A A POSTERIORI PROBABILITY empirical viewpoint, literally means after the fact-- after some data have been collected p(A) = # of times A has occurred / total number of occurrences PROBABILITY OF OCCURRENCE OF A *OR* B equal to the probability of the occurrence of A plus the probability of occurrence of B minus the probability of occurrence of both A and B p(A or B) = p(A) + p(B) - p(A and B) MUTUAL EXCLUSIVITY two events that cannot occur together