Poll Average Details- MEX President - 2012-07-01 20:00:00

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	Enrique Peña Nieto	Josefina Eugenia Vázquez Mota Santiago Creel Miranda	Andrés Manuel López Obrador	Gabriel Ricardo Quadri de la Torre	Others	Blank - Void
Consulta Mitofsky	6/24	X 1.00000		38.0000 - 4.4544 bias	21.0000 - -0.6534 bias	25.0000 - 2.3468 bias	2.0000 - -0.6748 bias
Parametría	6/23	X 0.98333		35.5000 - 8.0094 bias	19.1000 - -4.7576 bias	23.3000 - 6.9719 bias	3.1000 - 0.4997 bias
Reforma	6/17	X 0.88333		33.4000 - 0.6533 bias	19.0000 - -0.6004 bias	24.1000 - 2.0582 bias	3.5000 - 1.3459 bias
El Universal	6/14	X 0.83333		37.0000 - 2.6563 bias	21.4000 - 0.1101 bias	23.5000 - 1.2310 bias	3.0000 - 0.4012 bias
Milenio	6/4	X 0.66667		37.4000 - 5.9941 bias	20.5000 - -1.5091 bias	21.4000 - -0.8660 bias	3.0000 - 0.3814 bias
Covarrubias y Asociados	5/16	X 0.35000		36.0000 - 8.6053 bias	24.0000 - -1.2365 bias	27.0000 - bias	4.0000 - 2.1100 bias
Demotecnia	5/13	X 0.30000		35.0000 - 2.3541 bias	21.0000 - -0.5018 bias	25.0000 - -0.3028 bias	4.0000 - 2.4203 bias
TOTAL				31.583363	21.951766	21.652178	2.428178	0.000000	0.000000