CMNS 260 Lecture Notes - Lecture 12: Null Hypothesis, Contingency Table
10 May 2016
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Document Summary
Control variable: a third variable that shows whether a bivariate relationship hold up to alternative explanations. It can occur before or between other variables. Partials: refer to a certain kind of contingency table for three variables. They are tables that show the association between the independence and dependent variables for each category of a control variable: ensure that you: Comparison of bivariate contingency tables (cross tabulations) with partials after a third (control) variable is introduced. Focuses on the partial relationships found in each of the subsets created by the control variable. Examine the original bivariate relationship (called a zero order relationship) Compute partials (tri-variate table: third variable (control or test variable) introduced, within each subgroup of the test variable, construct a table to examine the original relationship (partials) Compare bivariate relationships in each of the partial tables (partial relationships) & with original relationships observed in bivartiate table.
