Poll Average Details- IA US Senate - 2020-11-03 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	Joni Ernst Write-In	Theresa Greenfield Theresa Greenfield	Suzanne Herzog	Rick Stewart	Write-In
Public Policy Polling	11/2	X 1.00000		47.0000 - -0.1800 bias	48.0000 - 1.1680 bias
Change Research	11/1	X 0.98333		47.0000 - -1.2913 bias	48.0000 - 1.4957 bias		2.0000 - 1.5239 bias
Data for Progress	11/1	X 0.98333		45.0000 - -0.9368 bias	49.0000 - 1.5464 bias	3.0000 - 0.3081 bias	2.0000 - 0.7656 bias
Civiqs	11/1	X 0.98333		47.0000 - -1.4007 bias	50.0000 - 2.9404 bias	0.0000 - 0.5425 bias	1.0000 - 0.3540 bias
Emerson College	10/31	X 0.96667		44.2000 - 0.6906 bias	48.1000 - 0.8084 bias
Insider Advantage	10/30	X 0.95000		50.7000 - 0.0480 bias	45.1000 - -0.0455 bias	0.5000 - -0.3089 bias	0.5000 - 0.9670 bias
Selzer & Co.	10/29	X 0.93333		46.0000 - -0.2736 bias	42.0000 - 1.0019 bias
Quinnipiac University	10/27	X 0.90000		48.0000 - -0.2682 bias	46.0000 - 1.0754 bias
RABA Research	10/24	X 0.85000		45.0000 - -3.1990 bias	51.0000 - 4.2859 bias
RMG Research	10/21	X 0.80000		43.0000 - -1.9745 bias	46.0000 - 3.2526 bias		2.0000 - -0.0740 bias
Siena Research Institute	10/20	X 0.78333		45.0000 - -0.0165 bias	44.0000 - 0.4840 bias
Monmouth University	10/19	X 0.76667		47.0000 - -0.9091 bias	49.0000 - 1.9679 bias
YouGov	10/9	X 0.60000		43.0000 - 0.0288 bias	47.0000 - 1.4134 bias
Opinion Insight, LLC	10/8	X 0.58333		45.0000 - -1.4171 bias	44.0000 - 2.9575 bias
Hart Research (D)	9/19	X 0.26667		48.0000 - -1.1830 bias	48.0000 - 3.2645 bias
Fabrizio Ward and Hart Research	9/5	X 0.03333		50.0000 - -0.2048 bias	45.0000 - 2.9444 bias
TOTAL				46.904214	45.341168	0.988125	0.751654	0.000000