SPSS Book: Correlation

Question 1

Df

Answer 1

degrees of freedom for a bivariate correlation are defined as N-2 where N is total sample size

Question 2

How to calculate proportion of variance in one variable that can be accounted for by variance in second variable

Answer 2

1) Square Pearson’s R

2) Multiply r^2 by 100 to calculate percentage of variance in one variable that can be accounted for by the second