The headlines have been buzzing with the “triumph” of statistics and math in this election. But before I jump into how well statistics served us, let’s do a little primer on the margin of error. Whenever we measure less than the whole population we’ll have some variability in the sample. Chances are good that the 

Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).