The New Hampshire primary poll was based on 2,760 questionnaires completed by voters on Tuesday evening as they left voting places throughout the state. The poll was conducted by Edison Research of Somerville, N.J., for the National Election Pool, a consortium of ABC News, The Associated Press, CBS News, CNN, Fox News and NBC News.
The results are based on interviews with voters entering randomly selected precinct sites and are subject to a potential sampling error of plus or minus 3 percentage points. Results based on smaller subgroups have a larger potential sampling error. In addition to sampling error, the practical difficulties of conducting any survey of voter opinion on primary day, like the reluctance of some voters to take time to fill out the questionnaire, may introduce other sources of error into the poll.
New Hampshire Exit Polls: How Different Groups Voted - Election 2012 - NYTimes.com
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