Poll Average Details- IL - District 06 - 2006-11-07 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	Peter J. Roskam Peter J. Roskam	Tammy Duckworth Tammy Duckworth	Patricia Elaine Beard
Reuters/Zogby	10/29	X 1.00000		40.0000 - 0.1506 bias	54.0000 - 1.3729 bias
Constituent Dynamics	10/26	X 0.95000		47.0000 - -0.3437 bias	48.0000 - 1.7318 bias
Bennett, Petts & Normington (D)	10/24	X 0.91667		43.0000 - -3.6705 bias	44.0000 - 4.9012 bias
Richard Day Research	10/24	X 0.91667		46.0000 - -2.3560 bias	42.0000 - 2.0170 bias
Market Shares Corp	10/18	X 0.81667		43.0000 - -0.3029 bias	39.0000 - -0.1166 bias
Greenberg Quinlan Rosner Research (D)	10/9	X 0.66667		46.0000 - -1.6043 bias	51.0000 - 2.2053 bias
Goodwin Simon Strategic Research (D)	9/20	X 0.35000		41.0000 - -3.0021 bias	41.0000 - 3.9471 bias
TOTAL				45.299913	43.890281	0.000000