SOC210 Lecture 20: Review Session
12 May 2017
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Soc 210 lecture 20 review session. Maximum difference: the biggest difference in column % for any row of the table. Chi-square based measures: phi and cramer"s v. Y: somer"s d: use when you can identify one of the variables as the dependent. Based on the logic of difference in rank: spearman"s rho. Answer: the number of pairs of cases ranked the same on both variables. Scatterplots visually display the relationship between two interval-ratio variables. Bivariate regression: y = a + bx. Pearson"s r: symmetric measures that reflects linear association, can also be used for hypothesis testing. The coefficient of determination (r2: the proportion of total variabtion in the dependent variable (y) that is explained by the independent variable (x) Multivariate measures of association for interval-ratio variables: partial correlation. Examine how a bivariate relationship changes when control variables are introduced. Investigate the effects of two+ independent variables on a dependent variable. Determine if relationship is direct, spurious or intervening: multiple regression.
