Poll Average Details- PA Governor - 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.

PollMid DateTime WeightInternal Tom Corbett Tom CorbettDaniel "Dan" Onorato Daniel "Dan" Onorato
YouGov10/31X 1.00000   51.1000 - 0.0717 bias 40.3000 - 1.3621 bias
Muhlenberg College10/31X 1.00000   49.0000 - 2.0125 bias 42.0000 - -1.1484 bias
Public Policy Polling10/31X 1.00000   52.0000 - 0.0973 bias 45.0000 - 0.9088 bias
Quinnipiac University10/30X 0.98333   52.0000 - 0.1363 bias 42.0000 - 0.3688 bias
Marist Institute10/28X 0.95000   51.0000 - -0.3584 bias 44.0000 - 0.4625 bias
Rasmussen Reports10/28X 0.95000   52.0000 - 1.6097 bias 43.0000 - 0.4145 bias
Susquehanna Polling & Research (SP&R)10/27X 0.93333   48.0000 - -1.4142 bias 41.0000 - 1.5519 bias
Opinion Research Corporation (CNN)10/26X 0.91667   52.0000 - 0.4310 bias 45.0000 - 0.8611 bias
Franklin & Marshall College10/24X 0.88333   51.0000 - -0.7416 bias 35.0000 - 0.4126 bias
Ipsos-Public Affairs10/24X 0.88333   49.0000 - -21.0260 bias 43.0000 - -19.3724 bias
Magellan Data & Mapping Strategies (R)10/12X 0.68333   48.0000 - 0.4956 bias 37.9000 - -0.5209 bias
ccAdvertising (R)10/7X 0.60000   44.8800 - 4.4042 bias 37.9700 - -1.7904 bias
Suffolk University9/27X 0.43333   47.0000 - -2.5107 bias 40.0000 - 1.8265 bias
Pulse Opinion Research9/18X 0.28333   49.0000 - 1.6182 bias 39.0000 - -0.2536 bias
Critical Insights9/16X 0.25000   38.0000 - -0.3271 bias 37.0000 - 1.9814 bias
Municipoll Research9/16X 0.25000   46.4800 - 0.8419 bias 38.2500 - 0.4551 bias
TOTAL 52.238488 43.694563