Displaying mean center

Discussion created by evroberts on Oct 18, 2013
Latest reply on Oct 21, 2013 by xander_bakker
I am displaying my county data (no. of cases) by finding the mean center of each county and displaying the mean center point as a single symbol by my chosen value. (Properties, Symbology, Advanced, Size, Size points by value x). How is the size or area of the circle calculated? Is my value the radius or diameter? I have chosen to display by this method so I can use transparency.

Thank you very much