Poll Average Details- RI US Senate - 2006-11-07 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	Sheldon Whitehouse Sheldon Whitehouse	Lincoln Chafee Stephen Laffey	Others	Stephen Laffey
Mason-Dixon	11/3	X 1.00000		45.0000 - 0.4277 bias	46.0000 - 0.8543 bias
Gallup	11/3	X 1.00000		48.0000 - -2.6491 bias	45.0000 - 2.8840 bias
Reuters/Zogby	10/31	X 0.95000		53.0000 - 1.3729 bias	39.0000 - 0.1506 bias
Rhode Island College	10/25	X 0.85000		43.0000 - -2.1952 bias	33.0000 - 2.0988 bias
Rasmussen Reports	10/19	X 0.75000		52.0000 - 0.4180 bias	44.0000 - 1.5977 bias
Fleming & Associates	10/17	X 0.71667		46.0000 - 0.6384 bias	42.0000 - 0.6713 bias
American Research Group	9/19	X 0.25000		45.0000 - -0.0031 bias	40.0000 - 0.7892 bias
Brown University	9/18	X 0.23333		40.0000 - 3.2620 bias	39.0000 - -2.6676 bias
TOTAL				47.600293	40.240072	0.000000	0.000000