PSYC 3000 Lecture Notes - Lecture 3: Sample Space, Summary Statistics, Down Syndrome
13 Oct 2016
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Psyc 3000 class 3: probability in our daily lives. With a small number of observations, outcomes of random phenomena may look quite different from what you expect. With a large number of observations, summary statistics settle down and get increasingly closer to particular numbers. As we make more observations, the proportion of time that a particular outcome occurs gets closer and closet to a certain number we would expect. This long-run proportion provides the basis for the definition of probability. With random phenomena, the proportion of time that something happens is highly random and variable in the short run but very predictable in the long run. With random phenomena, the probability of a particular outcome is the proportion of time that the outcome would occur in a long run of observations. Since probability is a proportion, it takes a value between 0 and 1.
