Which of the following indicates a fairly strong relationshi

Which of the following indicates a fairly strong relationship between X and Y?

R2=0.9
The p-value for the null hypothesis ?1=0 is 0.0001
The t-statistic for the null hypothesis ?1=0 is 30

Solution

Answer: R^2=.9

The R^2 value tells you how linearly related your variables are. It is measured on a scale of -1 being a perfect negative linear relationship, to +1 being a perfect positive linear relationship. .9 is a fairly strong, linear relationship.