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2013 Governor · VA

Public Policy Polling · fieldwork ended 2013-11-02 (3 days before the election) · 870 respondents · IVR

The poll said

Democrat 50% · Republican 43%

D+7.0

The certified result

Democrat 47.74% · Republican 45.22%

D+2.5

The arithmetic

  1. Poll margin = 50 − 43 = 7.00
  2. Actual margin = 47.736 − 45.217 = 2.519
  3. Signed miss = 7.00 − (2.519) = 4.482
  4. Absolute miss = |4.482| = 4.482

The poll overstated the Democrat by 4.5 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 63961, race ID 1257 (538 database).