Poll Average Details- NV US Senate - 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.

Poll	Mid Date	Time Weight	Internal	Dean Heller Dean Heller	Shelley Berkley Shelley Berkley	David Vanderbeek	None of These Candidates
Public Policy Polling	11/4	X 1.00000		48.0000 - -0.1800 bias	46.0000 - 1.1680 bias	4.0000 - 0.7018 bias
YouGov	11/3	X 0.98333		49.0000 - 0.0288 bias	40.0000 - 1.4134 bias
Survey USA	10/29	X 0.90000		46.0000 - 0.3265 bias	40.0000 - 0.5274 bias	6.0000 - 1.3786 bias	4.0000 - 1.6199 bias
Grove Insight (D)	10/28	X 0.88333	X 1/2	44.0000 - -1.0926 bias	43.0000 - 2.8547 bias
Marist Institute	10/24	X 0.81667		48.0000 - -0.4397 bias	45.0000 - 0.7635 bias
Rasmussen Reports	10/23	X 0.80000		50.0000 - 1.5977 bias	45.0000 - 0.4180 bias
Mellman Group (D)	10/17	X 0.70000	X 1/2	38.0000 - -2.5182 bias	41.0000 - 3.6270 bias	5.0000 - 0.7919 bias	4.0000 - 0.2760 bias
Suffolk University	10/9	X 0.56667		40.0000 - -2.1317 bias	37.0000 - 1.6356 bias	7.0000 - 3.0011 bias
Precision Opinion	10/6	X 0.51667		45.0000 - 8.0419 bias	43.0000 - -0.0458 bias
Gravis Marketing	10/4	X 0.48333		52.5000 - 0.2608 bias	35.8000 - 1.1590 bias
We Ask America	9/27	X 0.36667		45.2000 - 0.7934 bias	44.9000 - -0.1888 bias
Public Opinion Strategies (R)	9/20	X 0.25000		44.0000 - 2.6066 bias	39.0000 - -1.2825 bias	4.0000 - 0.7855 bias	9.0000 - 3.3711 bias
TOTAL				46.109528	41.007463	3.913032	3.235143