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2012 President · VA

Zogby Analytics · fieldwork ended 2012-10-27 (10 days before the election) · 827 respondents · Online Panel

The poll said

Democrat 48.1% · Republican 46%

D+2.1

The certified result

Democrat 51.16% · Republican 47.28%

D+3.9

The arithmetic

  1. Poll margin = 48.1 − 46 = 2.10
  2. Actual margin = 51.156 − 47.283 = 3.873
  3. Signed miss = 2.10 − (3.873) = -1.773
  4. Absolute miss = |-1.773| = 1.773

The poll overstated the Republican by 1.8 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 63880, race ID 698 (538 database).