The utility of the regression model can be determined by the

The utility of the regression model can be determined by the coefficient of determination or r-squared. In a model if the x variable is the hours spent studying for a test and the y variable is the test score, and you have an r-squared of 0.89, how do you interpret it?

Solution

Since r-square is 0.89 we can interpret that 89% of the test scores are determined by the number of hours spent by a student. i.e., if a student spends more number of hours then his score will increase significantly