Biology 2244A/B Study Guide - Midterm Guide: Random Variable, Probability Distribution, Sample Space
24 Dec 2018
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Document Summary
The basis of the idea of probability is that chance behaviour is unpredictable in the short run, but has a regular and predictable pattern in the long run. We call a phenomenon random if individual outcomes are uncertain but there is nonetheless a regular distribution of outcomes in a large number of repetitions. The probability of any outcome of a random phenomenon is the proportion of times the. We can use the long-term pattern of a particular variable to create a probability model outcome would occur in a very long series of repetitions to describe and quantify the uncertainty in a random phenomena. Probability models are mathematical representations of underlying patterns. Random samples can eliminate bias from the act of choosing a sample, but they can still be off because of the variability that results when we choose at random.
