Poll Average Details- CO US Senate - 2010-11-02 18:00:00

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 Ken Buck OthersMichael Bennet UncommittedMaclyn Stringer John FingerBob Kinsey Bruce E. Lohmiller Charley Miller J. Moromisato Jason Napolitano Michele M. Newman Robert Rank
YouGov10/28X 1.00000   47.8000 - 0.0288 bias 48.8000 - 1.4134 bias                
Marist Institute10/28X 1.00000   49.0000 - -0.4397 bias 45.0000 - 0.7635 bias                
RBI Strategies (D)10/26X 0.96667   42.0000 - -1.5356 bias 43.0000 - 0.9582 bias 3.0000 - 1.6308 bias 1.0000 - 0.3402 bias            
Opinion Research Corporation (CNN)10/26X 0.96667   47.0000 - 0.4312 bias 46.0000 - 0.8608 bias                
Rasmussen Reports10/25X 0.95000   48.0000 - 1.5977 bias 44.0000 - 0.4180 bias                
Public Policy Polling10/23X 0.91667   47.0000 - -0.1800 bias 47.0000 - 1.1680 bias                
Survey USA10/21X 0.88333   47.0000 - 0.3265 bias 47.0000 - 0.5274 bias                
Ipsos-Public Affairs10/17X 0.81667   48.0000 - -21.0260 bias 45.0000 - -19.3724 bias                
Pulse Opinion Research10/16X 0.80000   46.0000 - 1.6194 bias 45.0000 - -0.2544 bias                
Harstad Strategic (D)10/4X 0.60000  X 1/2 41.0000 - -1.6540 bias 44.0000 - 3.5038 bias 2.0000 - 1.2120 bias 1.0000 - 0.8195 bias            
Greenberg Quinlan Rosner Research (D)9/26X 0.46667   46.0000 - -1.6043 bias 48.0000 - 2.2053 bias                
ccAdvertising (R)9/13X 0.25000   39.4100 - 4.4041 bias 41.7900 - -1.7906 bias                
Public Opinion Strategies (R)9/1X 0.05000   40.0000 - 2.6066 bias 43.0000 - -1.2825 bias 5.0000 - 2.4568 bias              
TOTAL 49.762707 47.954684 1.281357 0.546282 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000