I have one domain that will not pull up statistics when you go to domain.com/webstat. The domain returns:
Forbidden

You don't have permission to access /webstat on this server.

To my knowledge this directory is not password protected or anything of that nature. The only thing I can think of that happened that someone who works for me improperly ran the chown command. All other domains are working fine. Does anyone have any idea what may have caused this?

Is it asking you for a username/password? The domain can be set up in the CP to be password protected, so you may want to look in the Control Panel > Domain > Setup icon to see how it's set up.

Also, is SSL enabled? Plesk changed this some time ago so that if https is enabled you need to use the https address to access the web stats. Either in the webstat directory or the plesk-stat directory depending upon the domain configuration.