MATH 1F92 Lecture Notes - Lecture 10: Dependent And Independent Variables, Frequency (Statistics), Contingency Table
15 Oct 2016
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Contingency table: can be also referred to as a two-way table" - and it relates two categories of data (using rows and columns) Example: the following contingency table below demonstrates the race of 3000 arrested for a crime, vs. their guilty or non-guilty status in the united states. Row variable: the guilty or not guilty status of people being arrested. Column variable: the race of the people being arrested. Marginal distribution: the frequency or relative frequency distribution of either the whole row or whole column in the contingency table. Created by adding the totals of the rows and columns. Example 1: make a frequency marginal distribution. 3000: make a relative frequency marginal distribution. Example 2: find the proportion of guilty people arrested who are caucasian, find the proportion of african americans who are non-guilty, find the proportion of guilty people to people arrested. 26% (780/ 3000) of the proportion of guilty people arrested are caucasian.
