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__Theoretical Probability__ - the likelihood an event should happen based on possible outcomes P(event)=(# of favorable outcomes/Total # of possible outcomes)

__Empirical Probability__ - the observed probability an outcome occurs based on data you collect P(event)=(# of favorable outcomes/Total # of observed outcomes)

__Probability Function__ - gives the probability that the outcome associated with that variable will occur

__Probability Distribution__ - similar to a probability function, a distribution identifies the probability of a variable occuring