If you select the ? tool, and click on the Summary Statistics Table Box, a Help screen will be displayed. Scrolling down the page shows the information on the Robust Standard Deviation
![txnelson_0-1674100937594.png txnelson_0-1674100937594.png](https://community.jmp.com/t5/image/serverpage/image-id/49281iA7875408FDB42011/image-dimensions/847x411?v=v2)
Clicking on that link displays the reference
Huber, P. J., and Ronchetti, E. M. (2009). Robust Statistics. 2nd ed. New York: John Wiley & Sons.
You can also search the Statistics Index
Help=>Statistics
Search on Robust Standard Deviation and it will bring up
![txnelson_1-1674101306734.png txnelson_1-1674101306734.png](https://community.jmp.com/t5/image/serverpage/image-id/49282i41526185E4D18012/image-dimensions/675x395?v=v2)
If you click on the Help Topic it will bring you to the save help screen shown above.
Jim