Poll Average Details- MA US Senate - Special - 2013-06-25 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	Edward J. Markey Edward J. Markey	Gabriel Gomez Michael J. Sullivan	Write-In	Richard Heos
Suffolk University	6/22	X 1.00000		52.0000 - 1.6356 bias	42.0000 - -2.1317 bias
Western New England University	6/20	X 0.96667		49.0000 - -0.3485 bias	41.0000 - -0.5328 bias
Emerson College	6/20	X 0.96667		51.0000 - 0.8084 bias	41.0000 - 0.6906 bias
Boston Herald	6/19	X 0.95000		56.0000 - 6.4288 bias	36.0000 - -3.4811 bias
McLaughlin & Associates (R)	6/19	X 0.95000		47.0000 - -3.4211 bias	44.0000 - 4.0805 bias
OnMessage Inc. (R)	6/17	X 0.91667	X 1/2	47.0000 - -1.9372 bias	40.0000 - 3.3406 bias
University of New Hampshire	6/14	X 0.86667		54.0000 - 2.6652 bias	43.0000 - -2.2994 bias
Public Policy Polling	6/4	X 0.70000		47.0000 - 1.1680 bias	39.0000 - -0.1800 bias
University of Massachusetts	6/4	X 0.70000		51.0000 - 1.2969 bias	40.0000 - -1.1910 bias
New England College	6/2	X 0.66667		52.0000 - -1.3013 bias	40.0000 - 2.5219 bias
ccAdvertising (R)	5/30	X 0.61667		36.2900 - -1.7906 bias	32.0100 - 4.4041 bias
MassINC Polling Group	5/6	X 0.21667		46.0000 - -0.0957 bias	38.0000 - 0.8107 bias
TOTAL				49.057380	39.859929	0.000000	0.000000