The data set consists of
- explanatory variable for 's;
- dependent variable for 's.
Here the values , , , and are computed as in the following table.
|Variable||Mean||Sum of squares|
The sample correlation
.describes the strength of linear relationship for the pair of data. Here is the sum of squares within the response variable 's. The value is always between and . The value is close to when the pairs lie close to the straight line with positive slope, and it is close to when it is aligned with a negative slope.
The fitted linear model