SOCIAL STATISTICS
Managing Data, Conducting Analyses, Presenting Results Fifth Edition
A measure of the strength of the relationship between two ratio-level variables; ranges from -1 to +1
Correlation coefficient
A table that shows the correlations among multiple variables
Correlation matrix
A measure of the extent to which two variables vary together; appears in the numerator of both the formula for the regression slope and the formula for the correlation coefficient
Covariance
An equation with the typical format y = a + b(x)
Linear equation
The predicted value of the dependent variable when the independent variable is zero
Regression constant
A measure of the proportions of the variation in the dependent variable that can be explained by its relationship to the independent variable(s)
r-squared (R-squared)
A graphic that shows the relationship between two ratio-level variables by placing the cases onto a two-dimensional graph
Scatterplot
A statistical technique used to investigate the relationship between two ratio-level variables
Simple regression
The amount that the dependent variable changes when the independent variable goes up by one unit
Slope