Poll Average Details- DE US Senate - Special - 2010-11-02 19:00:00

The Poll Average is a weighted and adjusted number.
[Mid Date Column] All times are calculated by the middle date of the poll if it spans multiple days.
A time window of 2 months prior to the most recent poll is used.
[Time Weight Column] Polls are weighted in the amount they contribute to the final results in a linear fashion in this time window - the newest poll has a weight of 1, a poll 30 days prior will have a weight of 0.5 and a poll 60 days out will have a weight of 0. If the same pollster has more than one poll in this time period, only the newest will be used.
[Internal Column] If a poll is marked as being an internal poll for one of the candidates, it's weight will be halved.
[Candidate Columns, Bias] OurCampaigns has calculated partisan bias figures for all Polling Firms based on data from final vote totals in races they have polled. These amounts are subtracted from the poll result - in the case the bias figure is negative it will effectively be added to the poll result and appear as two dashes (minus a negative = plus). [TOTAL Row] The adjusted weights are summed for each poll result and the adjusted poll results for each candidate are multiplied by the poll weight and then summed. Each candidate's poll sum is divided by their weight sum to give the total.

Poll	Mid Date	Time Weight	Internal	Chris Coons Chris Coons	Christine O'Donnell Mike Castle	James W. "Jim" Rash	Glenn A. Miller	Samtra Devard	Maurice F. Bourgeois
Monmouth University	10/27	X 1.00000		51.0000 - 1.9679 bias	41.0000 - -0.9091 bias
Fairleigh Dickinson University	10/26	X 0.98333		57.0000 - -0.3787 bias	36.0000 - 0.7776 bias
Rasmussen Reports	10/14	X 0.78333		51.0000 - 0.4180 bias	40.0000 - 1.5977 bias
Opinion Research Corporation (CNN)	10/12	X 0.75000		57.0000 - 0.8608 bias	38.0000 - 0.4312 bias
Survey USA	10/12	X 0.75000		54.0000 - 0.5274 bias	33.0000 - 0.3265 bias
Magellan Data & Mapping Strategies (R)	10/10	X 0.71667		54.0000 - -0.5207 bias	36.0000 - 0.4956 bias
Pulse Opinion Research	10/9	X 0.70000		54.0000 - -0.2544 bias	38.0000 - 1.6194 bias
University of Delaware	9/30	X 0.55000		61.0000 - 3.6905 bias	37.0000 - -7.1473 bias
ccAdvertising (R)	9/20	X 0.38333		49.0800 - -1.7906 bias	33.7500 - 4.4041 bias
Public Policy Polling	9/12	X 0.25000		50.0000 - 1.1680 bias	34.0000 - -0.1800 bias
TOTAL				53.528996	37.033180	0.000000	0.000000	0.000000	0.000000