As a marketer, I reference industry statistics so I can more effectively communicate the need for solutions whether through a powerpoint presentation, newsletter, sales document or at a trade show.
Seth Godin hits the nail on the mark regarding how this data should and should not be graphically presented in a powerpoint. It's not brain surgery, but until he walked me through the thought process, I hadn't realized what an impact properly arranging the graphics could make. It takes me back to the days of my college psychology class and he is so right.
Read his thoughts here: http://www.typepad.com/t/trackback/2123/21206835