To run a stepwise Linear Regression on the standardized variables, recall the Linear Regression dialog box.

Deselect Vehicle type through Fuel efficiency as independent variables.

Select Zscore: Vehicle type through Zscore: Fuel efficiency as independent variables.

Select Stepwise as the entry method.

Select Model as the case labeling variable.

Click Statistics.

Deselect Part and partial correlations.

Select Casewise diagnostics and type 2 in the text box.

Click Continue.

Click Plots in the Linear Regression dialog box.

Select *SDRESID as the y variable and *ZPRED as the x variable.

Select Histogram.

Click Continue.

Click Save in the Linear Regression dialog box.

Select Standardized in the Predicted Values group.

Select Cook's and Leverage values in the Distances group.

Click Continue.

Click OK in the Linear Regression dialog box.