Poll Average Details- IL US President - 2008-11-04 20:00:00

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 Barack Obama	John McCain	Ralph Nader	Cynthia McKinney Howie Hawkins	Bob Barr	Ron Paul	Write-In	Chuck Baldwin	Frank Moore	Jonathan E. Allen	John Joseph Polachek	Ronald G. Hobbs	Donald K. Allen
Rasmussen Reports	11/1	X 1.00000		60.0000 - 0.4222 bias	38.0000 - 1.5749 bias
YouGov	11/1	X 1.00000		58.0000 - 1.4663 bias	39.0000 - -0.0047 bias
Research 2000	10/23	X 0.85000		59.0000 - 1.1463 bias	35.0000 - 0.1379 bias
Big Ten	10/22	X 0.83333		61.0000 - 3.5079 bias	32.0000 - -1.9740 bias
Market Shares Corp	10/18	X 0.76667		56.0000 - -0.1166 bias	32.0000 - -0.3029 bias	2.0000 - 1.7004 bias
American Research Group	9/16	X 0.23333		51.0000 - -0.0037 bias	45.0000 - 0.7897 bias
TOTAL				57.249997	35.969156	0.299600	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000