Poll Average Details- VA US Senate - 2018-11-06 18:00:00

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	Tim Kaine	Corey Stewart Corey Stewart	Matt Waters Abstention	Winsome Earle Sears	Write-In
University of Mary Washington	9/9	X 1.00000		52.0000 - -0.3831 bias	36.0000 - -1.5760 bias	5.0000 - 4.0533 bias
Cygnal (R)	8/24	X 0.73333		50.2000 - -0.0166 bias	45.7000 - 0.2881 bias
Roanoke College	8/19	X 0.65000		51.0000 - -1.8873 bias	34.0000 - 1.2214 bias	4.0000 - 2.7729 bias
Virginia Commonwealth University	7/30	X 0.31667		49.0000 - bias	26.0000 - bias	5.0000 - bias
TOTAL				51.519266	37.191660	1.692025	0.000000	0.000000