Poll Average Details- NV US President - 2008-11-04 23:00:00

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	Barack Obama Hillary Clinton	John McCain Mitt Romney	Cynthia McKinney	Bob Barr	Ralph Nader	None of These Candidates	Chuck Baldwin
Public Policy Polling	11/2	X 1.00000		51.0000 - 1.4367 bias	47.0000 - -0.2365 bias
YouGov	11/1	X 0.98333		51.0000 - 1.5208 bias	46.0000 - -0.0504 bias
Zogby International	11/1	X 0.98333		50.7000 - 0.8870 bias	42.9000 - 0.0434 bias
Mason-Dixon	10/29	X 0.93333		47.0000 - 0.4817 bias	43.0000 - 0.8083 bias
Research 2000	10/28	X 0.91667		50.0000 - 1.1463 bias	45.0000 - 0.1379 bias
Opinion Research Corporation (CNN)	10/28	X 0.91667		52.0000 - 0.8606 bias	45.0000 - 0.4315 bias
Rasmussen Reports	10/27	X 0.90000		50.0000 - 0.4379 bias	46.0000 - 1.5515 bias
Suffolk University	10/27	X 0.90000		50.0000 - 1.6686 bias	40.0000 - -2.1920 bias
GfK	10/26	X 0.88333		52.0000 - -2.9532 bias	40.0000 - -4.0330 bias
InsiderAdvantage	10/13	X 0.66667		49.0000 - -0.1034 bias	46.0000 - 0.2182 bias
Zogby Interactive	10/9	X 0.60000		47.5000 - 0.0637 bias	47.1000 - 0.8374 bias
American Research Group	9/29	X 0.43333		47.0000 - -0.0037 bias	49.0000 - 0.7897 bias
Grove Insight (D)	9/19	X 0.26667		47.0000 - 2.8547 bias	45.0000 - -1.0926 bias
TOTAL				49.335017	44.720918	0.000000	0.000000	0.000000	0.000000	0.000000