1.

2.

Select Analyze > Fit Y by X.

3.

4.

5.

Click OK.

To create the example on the left in Example of Regression Analysis for Whole Sample and Grouped Sample:
6.

Select Fit Line from the red triangle menu.

To create the example on the right in Example of Regression Analysis for Whole Sample and Grouped Sample:
7.

From the Linear Fit menu, select Remove Fit.

8.

From the red triangle menu, select Group By.

9.

10.

Click OK.

11.

Select Fit Line from the red triangle menu.

The scatterplot to the left in Example of Regression Analysis for Whole Sample and Grouped Sample has a single regression line that relates weight to height. The scatterplot to the right shows separate regression lines for males and females.