Poll Average Details- MD US President - D Primary - 2008-02-12 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.

PollMid DateTime WeightInternal Barack Obama Barack ObamaHillary Clinton Barack ObamaJohn Edwards Barack ObamaJoe Biden Barack ObamaChris Dodd Barack ObamaDennis J. Kucinich Barack ObamaBill Richardson Barack ObamaMike Gravel Barack Obama Uncommitted Barack Obama
Survey USA2/10X 1.00000   55.0000 32.0000              
Mason-Dixon2/8X 0.96667   53.0000 35.0000              
Rasmussen Reports2/6X 0.93333   57.0000 31.0000              
Gonzales Research & Marketing Strategies1/11X 0.50000   36.0000 33.0000 17.0000            
OpinionWorks1/9X 0.46667   39.0000 26.0000 12.0000            
TOTAL 50.594828 31.913793 14.586207 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000