Map Tools : Viewing map information : Running custom statistical expressions
  
Running custom statistical expressions
If your map administrator has added custom statistical expressions, you will notice a Statistics drop-down menu on the top of the Results window after you have made a selection or performed a search. Select the Statistics drop-down menu and then select the option you want to run. The expression takes into account all of the selected results in the Results window.
 
NOTE: 
All those features whose check box is selected on the Results window are considered selected, which may include features on pages of the Results window not currently displayed.
The result of the statistical expression is displayed on a text box.
 
Figure 132 
Disabling autorun statistical tools
If your map administrator has configured a statistical tool to run automatically after you perform a selection or search on a layer (group of map features), you will notice a dialog box appear displaying the title of the statistical tool and a numeric result.
You have the option of suppressing these autorun tools by selecting the Disable Auto Execute option in the lower left corner as shown below.
 
Figure 133