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.

Poll	Mid Date	Time Weight	Internal	Tom Corbett Tom Corbett	Daniel "Dan" Onorato Daniel "Dan" Onorato
YouGov	10/31	X 1.00000		51.1000 - 0.0717 bias	40.3000 - 1.3621 bias
Muhlenberg College	10/31	X 1.00000		49.0000 - 2.0125 bias	42.0000 - -1.1484 bias
Public Policy Polling	10/31	X 1.00000		52.0000 - 0.0973 bias	45.0000 - 0.9088 bias
Quinnipiac University	10/30	X 0.98333		52.0000 - 0.1363 bias	42.0000 - 0.3688 bias
Marist Institute	10/28	X 0.95000		51.0000 - -0.3584 bias	44.0000 - 0.4625 bias
Rasmussen Reports	10/28	X 0.95000		52.0000 - 1.6097 bias	43.0000 - 0.4145 bias
Susquehanna Polling & Research (SP&R)	10/27	X 0.93333		48.0000 - -1.4142 bias	41.0000 - 1.5519 bias
Opinion Research Corporation (CNN)	10/26	X 0.91667		52.0000 - 0.4310 bias	45.0000 - 0.8611 bias
Franklin & Marshall College	10/24	X 0.88333		51.0000 - -0.7416 bias	35.0000 - 0.4126 bias
Ipsos-Public Affairs	10/24	X 0.88333		49.0000 - -21.0260 bias	43.0000 - -19.3724 bias
Magellan Data & Mapping Strategies (R)	10/12	X 0.68333		48.0000 - 0.4956 bias	37.9000 - -0.5209 bias
ccAdvertising (R)	10/7	X 0.60000		44.8800 - 4.4042 bias	37.9700 - -1.7904 bias
Suffolk University	9/27	X 0.43333		47.0000 - -2.5107 bias	40.0000 - 1.8265 bias
Pulse Opinion Research	9/18	X 0.28333		49.0000 - 1.6182 bias	39.0000 - -0.2536 bias
Critical Insights	9/16	X 0.25000		38.0000 - -0.3271 bias	37.0000 - 1.9814 bias
Municipoll Research	9/16	X 0.25000		46.4800 - 0.8419 bias	38.2500 - 0.4551 bias
TOTAL				52.238488	43.694563