Whenever a political election is coming up, a lot of the news is centered around the races going on between different candidates.

Polling is very big in politics, since we all (especially the candidates) want to know where they stand. For instance, a polling company might poll voters before and after a debate to see if it changed their views.

1. Could you help me find an interesting article on a study where confidence intervals were computed in their analysis. And paste an excerpt from the article here that shows the confidence intervals and what they are about.