Poll Average Details- IA US President - 2008-11-04 23:00:00

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	Barack Obama Hillary Clinton	John McCain Mike Huckabee	Ralph Nader	Cynthia McKinney	James E. Harris	Brian P. Moore	Gloria E. La Riva	Write-In	Chuck Baldwin	Bob Barr
YouGov	11/1	X 1.00000		52.0000 - 1.4134 bias	41.0000 - 0.0288 bias
Selzer & Co.	10/31	X 0.98333		54.0000 - 1.0019 bias	37.0000 - -0.2736 bias	2.0000 - 1.6063 bias							1.0000 - 2.3909 bias
Survey USA	10/29	X 0.95000		55.0000 - 0.5274 bias	40.0000 - 0.3265 bias
Marist Institute	10/24	X 0.86667		52.0000 - 0.7635 bias	42.0000 - -0.4397 bias
Rasmussen Reports	10/23	X 0.85000		52.0000 - 0.4180 bias	44.0000 - 1.5977 bias
Big Ten	10/22	X 0.83333		52.0000 - 3.5079 bias	39.0000 - -1.9740 bias
Research 2000	10/22	X 0.83333		54.0000 - 1.1463 bias	39.0000 - 0.1379 bias
TOTAL				51.792327	40.316598	0.393700	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	-1.390900