http://www.publicagenda.org/pages/best-estimates-guide-sample-size-and-margin-error http://www.publicagenda.org/pages/best-estimates-guide-sampl... 100,000 is

http://www.publicagenda.org/pages/best-estimates-guide-sample-size-and-margin-error http://www.publicagenda.org/pages/best-estimates-guide-sampl... 100,000 is overkill. 1,000 is reasonably sufficient.