Poll Average Details- MT - At-Large - 2012-11-06 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.

PollMid DateTime WeightInternal Steve Daines Steve DainesKim Gillan Kim GillanDavid Kaiser David Kaiser
Public Policy Polling11/3X 1.00000   48.0000 - -0.1428 bias 44.0000 - 1.2250 bias 3.0000 - 0.9670 bias
Mason-Dixon10/31X 0.95000   51.0000 - 0.7980 bias 40.0000 - 0.4220 bias 1.0000 - 0.2253 bias
Pharos Research Group10/28X 0.90000   51.6000 - 1.0762 bias 44.6000 - 1.6664 bias  
Montana State University Billings9/30X 0.43333   36.3000 - -1.1286 bias 22.6000 - 0.9098 bias 3.4000 - 0.5258 bias
Mellman Group (D)9/26X 0.36667   36.0000 - -2.6345 bias 34.0000 - 3.8371 bias  
TOTAL 47.038675 38.211824 1.684385