Did I Get This – Simulation #1 (p-hat)
http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2012/12/DIG_09002_147.swf
http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2012/12/DIG_09003_147.swf
This document is linked from Sampling Distributions.