Poll Average Details- SD US Senate - 2014-11-04 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	Michael "Mike" Rounds Michael "Mike" Rounds	Rick Weiland Rick Weiland	Larry Pressler	Gordon K. Howie
Monmouth University	10/27	X 1.00000		45.0000 - -1.1567 bias	31.0000 - 2.2180 bias	19.0000 - 0.6269 bias	1.0000 - 0.6269 bias
Rasmussen Reports	10/27	X 1.00000		45.0000 - 1.5749 bias	31.0000 - 0.4222 bias	21.0000 - 1.2092 bias
Survey USA	10/26	X 0.98333		43.0000 - 0.3321 bias	32.0000 - 0.6087 bias	19.0000 - 1.6199 bias	2.0000 - 1.6199 bias
Marist Institute	10/23	X 0.93333		43.0000 - -0.7027 bias	29.0000 - 1.2095 bias	14.0000 - 3.3151 bias
YouGov	10/23	X 0.93333		38.0000 - -0.0047 bias	25.0000 - 1.4663 bias	17.0000 - 1.2001 bias
Mason-Dixon	10/23	X 0.93333		42.0000 - 0.8197 bias	33.0000 - 0.4628 bias	13.0000 - -0.0380 bias	2.0000 - -0.0380 bias
Public Opinion Strategies (R)	10/20	X 0.88333	X 1/2	37.0000 - 2.6067 bias	24.0000 - -1.2826 bias	24.0000 - 3.3711 bias	3.0000 - 3.3711 bias
Harper Polling	10/11	X 0.73333		37.0000 - -3.1660 bias	33.0000 - 1.2618 bias	23.0000 - 4.2262 bias	5.0000 - 4.2262 bias
Public Policy Polling	9/29	X 0.53333		35.0000 - -0.1911 bias	28.0000 - 1.3449 bias	24.0000 - 1.9911 bias	8.0000 - 1.9911 bias
Nielson Brothers Polls	9/25	X 0.46667		39.4000 - -4.4687 bias	25.7000 - 4.8984 bias	23.7000 - 6.7604 bias	3.6000 - 6.7604 bias
TOTAL				41.481027	28.506368	16.921138	0.939269