PSY 207 Study Guide - Midterm Guide: Statistical Inference, Statistical Unit, Percentile Rank
13 Mar 2017
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Exam review: part a - chapter 6: calculating simple probability. When several different outcomes are possible, we define the probability for any particular outcome as a fraction or proportion. If the possible outcomes are identified as a, b, c, d, etc. , then probabilit. E. g. , a colony of laboratory rats contains 7 albino rats and 23 hooded rats. 30 = number of albino outcomes: additive law-probability of one of a set of events occurring on one occasion. E. g. , what is the probability of selecting a king of diamonds or a queen of. Keyword to look for in questions is or . P(a or b) = p(a) + p(b) - p(ab) 1/52 + 1/52 = simple probability that each will happen. 0 = probability that both will happen at same time: multiplicative law-probability of multiple events occurring one after another. E. g. , what is the probability of selecting a king of diamonds and then selecting a.
