Poll Average Details- Scottish Parliament - Regional Proportional Popular Vote - 2007-05-03 14:00:00

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	Scottish National Party	Labour Party	Conservative Party	Liberal Democrats	Scottish Green Party	Solidarity	Others	British National Party	UK Independence Party	Socialist Labour Party	Scottish Senior Citizens Unity Party	Scottish Unionist Party	Adam Lyal's Witchery Tour Party	Christian Peoples Alliance	Christian Party	Scottish Voice	Scottish Jacobite Party	Independent Green Voice	Publican Party	Free Scotland Party	Socialist Equality Party	Scottish Socialist Party
YouGov	5/2	X 1.00000		32.0000 - -1.7894 bias	27.0000 - -2.5726 bias	13.0000 - -1.9396 bias	10.0000 - 2.0691 bias	9.0000 - 2.9157 bias
Mruk Cello	4/19	X 0.78333		37.0000 - 6.4924 bias	36.0000 - 3.1926 bias	11.0000 - -5.4169 bias	11.0000 - 2.1193 bias	4.0000 - -0.0067 bias
Populus	4/17	X 0.75000		34.0000 - 2.5464 bias	27.0000 - 2.9843 bias	14.0000 - 1.6886 bias	18.0000 - 2.5834 bias
Progressive Scottish Opinions	4/5	X 0.55000		39.0000 - -0.8437 bias	28.0000 - 7.6398 bias	14.0000 - -0.7418 bias	10.0000 - -1.4354 bias	4.0000 - -0.4228 bias	1.0000 - -0.4915 bias																1.0000 - 1.0072 bias
TNS System Three	3/27	X 0.40000		36.0000 - 9.2934 bias	25.0000 - 1.5692 bias	11.0000 - -2.0855 bias	13.0000 - -0.4221 bias
TOTAL				32.691070	26.943713	14.461793	10.940156	4.995181	1.491500	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	-0.007200