Poll Average Details- UK EU Membership Referendum - 2016-06-23 17:00:00

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	Leave	Remain
YouGov	6/22	X 1.00000		49.0000 - -6.7299 bias	51.0000 - 6.7299 bias
Opinium	6/22	X 1.00000		45.0000 - -1.3300 bias	44.0000 - 1.3300 bias
Savanta ComRes	6/22	X 1.00000		46.0000 - -5.8918 bias	54.0000 - 5.8918 bias
Ipsos MORI	6/22	X 1.00000		48.0000 - -3.8918 bias	52.0000 - 3.8918 bias
Populus	6/22	X 1.00000		45.0000 - -6.8918 bias	55.0000 - 6.8918 bias
Survation	6/20	X 0.96667		49.3000 - -2.4474 bias	50.7000 - 2.4474 bias
ORB International	6/19	X 0.95000		46.0000 - -5.4272 bias	53.0000 - 5.4272 bias
ICM Research	6/13	X 0.85000		53.0000 - -4.0309 bias	47.0000 - 4.0309 bias
TOTAL				52.157497	46.303877