Entrance poll

"Entrance poll" means:


 * 1) An entrance poll is a poll that is taken before voters have cast their votes at the polling stations. It is the opposite to a Exit poll.


 * Sources: http://statistics.about.com/od/Applications/a/Entrance-And-Exit-Polls.htm, http://www.washingtonpost.com/wp-dyn/content/graphic/2008/01/04/GR2008010400823.html, https://en.wikipedia.org/wiki/Entrance_poll and http://edition.cnn.com/election/primaries/polls/NV/Dem.