Poll Average Details- IL US President - R Primary - 2012-03-20 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	Mitt Romney	Rick Santorum	Newt Gingrich	Ron Paul	Rick Perry	Charles E. "Buddy" Roemer III
Public Policy Polling	3/18	X 1.00000		45.0000 - -0.1800 bias	30.0000 - -0.1800 bias	12.0000 - -0.1800 bias	10.0000 - -0.1800 bias
American Research Group	3/18	X 1.00000		44.0000 - 0.7892 bias	30.0000 - 0.7892 bias	13.0000 - 0.7892 bias	8.0000 - 0.7892 bias
Rasmussen Reports	3/15	X 0.95000		41.0000 - 1.5977 bias	32.0000 - 1.5977 bias	14.0000 - 1.5977 bias	7.0000 - 1.5977 bias
We Ask America	3/14	X 0.93333		37.0000 - 0.7934 bias	31.0000 - 0.7934 bias	14.0000 - 0.7934 bias	8.0000 - 0.7934 bias
Market Shares Corp	3/9	X 0.85000		35.0000 - -0.3029 bias	31.0000 - -0.3029 bias	12.0000 - -0.3029 bias	7.0000 - -0.3029 bias
TOTAL				40.061256	30.226749	12.455622	7.490833	0.000000	0.000000