Correlation - MAR 3615

covariation

the amount of change in one variable that is consistently related to the change in another variable of interest

a linear relationship

does the graph look like a line

positive relationship

as the independent variable increases, the dependent increases.

What is the relationship direction?

negative relationship

as the independent variable increases, the dependent variable decreases.

What is the relationship direction?

strength of the relationship

how close the points are on a graph to a line of best fit

curvilinear relationship

as the independent variable increases, the DV may increase and then decrease (or reverse) creating an arc

pearson correlation coefficient

a statistical measure of the strength of a linear relationship between two metric variables

-1 and 1, 0 means no association

Describe the pearson coefficient as seen in a SPSS test result

association, not causation

correlation indicates “…” not “…”