With all the Trump bluster about polls being "rigged", this might be a good time to delve into polling methods, and when survey data is considered 'scientific'.

http://www.nytimes.com/2015/06/21/op...ling.html?_r=1

http://cstl-cla.semo.edu/rdrenka/Renka_papers/polls.htm

http://video.cnbc.com/gallery/?video=3000560769

http://www.businessinsider.com/nate-...crisis-2015-11

http://www.newyorker.com/magazine/20...he-new-machine



"The polls we actually see are advertising for something else".