# Ch. 11 Probability and Statistics Terms and Definitions New (3) (1).docx

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Ch. 11 Probability and Statistics Terms and Definitions Deterministic techniques assume that no uncertainty exists in model parameters. Chapters 2-10 introduced topics that are not subject to uncertainty or variation. Probabilistic techniques include uncertainty and assume that there can be more than one model solution. Classical, or a priori (prior to the occurrence) , probability is an objective probability that can be stated prior to the occurrence of the event. It is based on the logic of the process producing the outcomes. Objective probabilities that are stated after the outcomes of an event have been observed are relative frequencies , based on observation of past occurrences. Relative frequency is the more widely used definition of objective probability. Subjective probability is an estimate based on personal belief, experience, or knowledge of a situation. An experiment is an activity that results in one of several possible outcomes which are termed events .