Poll Average Details- IA US Senate - 2002-11-05 21:00:00

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	Tom Harkin Write-In	Greg Ganske	Tim Harthan Write-In	Others	Richard J. Moore
Iowa Poll	11/1	X 1.00000		50.0000 - 0.8709 bias	41.0000 - -1.0525 bias	5.0000 - 4.0999 bias
Gazette Communications	10/30	X 0.96667		50.6000 - 9.7112 bias	28.6000 - -7.6679 bias
Survey USA	10/29	X 0.95000		60.0000 - 0.5274 bias	38.0000 - 0.3265 bias
KCCI-KIMT TV	10/16	X 0.73333		50.0000 - 1.2148 bias	41.0000 - 1.2077 bias
Public Opinion Strategies (R)	9/19	X 0.28333		45.0000 - -1.2825 bias	41.0000 - 2.6066 bias
Research 2000	9/10	X 0.13333		52.0000 - 1.1463 bias	40.0000 - 0.1379 bias
TOTAL				49.382850	38.920178	0.900100	0.000000	0.000000