The site compiles polling data through a unique methodology derived from Silver's experience in baseball sabermetrics to "balance out the polls with comparative demographic data"[1] and "weighting each poll based on the pollster's historical track record, sample size, and recentness of the poll."
The site compiles polling data through a unique methodology derived from Silver's experience in baseball sabermetrics to "balance out the polls with comparative demographic data"[1] and "weighting each poll based on the pollster's historical track record, sample size, and recentness of the poll."