Statistical Sciences 2037A/B Study Guide - Final Guide: Frequentist Probability, Statistic, Statistical Parameter
30 Nov 2016
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Relative frequency probability: a measure of the long-run relative frequency of an event occurring, in identical repeated trials: make an assumption about the theoretical probability. Probability distribution: summarizes possible outcomes for a procedure and the frequency at which they occur: observe the relative frequency over many repetitions of the procedure. Outcomes are independent: knowledge of one event does not in uence the probability of the other event. Expected value: avg value of any measurement over the long run (mean value over repeated trials: to get an expectation: Identify all possible outcomes (a1, a2, a3 . ) Assign probability to each outcome (p1, p2, p3 : ev = p1a1 + p2a2 + p3a3 + , sum of each probability x the probability of that outcome. Vocabulary in health testing: ex. breast cancer occurs in about 1 in 100 women = prevalence, mammograms correctly identify someone as having breast cancer with a rate of.
