PSYC 2021 Midterm: PSYC 2021 - Exam 2 Notes (Fall 2011)
10 Mar 2012
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Document Summary
Probability quantifies the possibility that something is true through calculations or tables. The probability (p) of a target event = number of target events / number of total events. The total number of possible events (n) can be represented as a multidimensional matrix of the total number of events (a) and the number of trials (n): n = a n (e. g. 63 = 216) The most popular outcomes are binomial events such as: win or lose, male or female, etc. This division does not seem to be clear-cut as presented here and there are situations that fall in between. (p) defines the target probabilities while (q) defines the probabilities outside the target probability. The formula states: p + q = 1. The coefficient (c) is the different ways in which two possible outcomes (correct and incorrect) can mix. The mean is calculated as: = np while the standard deviation is: = npq.
