Poll Average Details- GA US Senate - 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	Johnny Isakson Johnny Isakson	Mike Thurmond Mike Thurmond	Chuck Donovan	Raymond Beckworth	Brian Russell Brown	Steve Davis
Mason-Dixon	10/28	X 1.00000		56.0000 - 0.8543 bias	33.0000 - 0.4277 bias	4.0000 - 0.2403 bias
Survey USA	10/24	X 0.93333		58.0000 - 0.3265 bias	34.0000 - 0.5274 bias	5.0000 - 1.3296 bias
Rasmussen Reports	10/24	X 0.93333		59.0000 - 1.5977 bias	29.0000 - 0.4180 bias	5.0000 - 1.6402 bias
Landmark Communications (R)	10/19	X 0.85000		55.8000 - -0.2052 bias	35.0000 - 0.2105 bias	2.0000 - 1.2448 bias
Insider Advantage	9/27	X 0.48333		61.0000 - 0.0480 bias	29.0000 - -0.0455 bias	3.0000 - 0.9670 bias
TOTAL				57.051032	31.928490	2.844228	0.000000	0.000000	0.000000