Did I Get This – Simulation #3 (x-bar)
http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2012/12/DIG_09006_150.swf
http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2012/12/DIG_09007_150.swf
http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2012/12/DIG_09008_150.swf
This document is linked from Sampling Distributions.