Poll Average Details- MN District 08 - 2012-11-06 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.

PollMid DateTime WeightInternal Rick Nolan Chip Cravaack Write-In
Survey USA11/3X 1.00000   47.0000 - 0.5274 bias 45.0000 - 0.3265 bias  
Public Policy Polling10/26X 0.86667   48.0000 - 1.1680 bias 44.0000 - -0.1800 bias  
OnMessage Inc. (R)10/25X 0.85000  X 1/2 40.0000 - -1.9372 bias 50.0000 - 3.3406 bias  
Pulse Opinion Research10/20X 0.76667   50.0000 - -0.2544 bias 43.0000 - 1.6194 bias  
Victoria Research and Consulting10/8X 0.56667  X 1/2 48.0000 - 3.1494 bias 44.0000 - -1.3301 bias  
Global Strategy Group (D)9/23X 0.31667  X 1/2 42.0000 - 2.9065 bias 42.0000 - -2.0582 bias  
TOTAL 46.374140 44.096461 0.000000