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2010 Governor · MN

Princeton Survey Research Associates International · fieldwork ended 2010-10-20 (13 days before the election) · 999 respondents · Live Phone

The poll said

Democrat 41% · Republican 34%

D+7.0

The certified result

Democrat 43.63% · Republican 43.21%

D+0.4

The arithmetic

  1. Poll margin = 41 − 34 = 7.00
  2. Actual margin = 43.627 − 43.211 = 0.416
  3. Signed miss = 7.00 − (0.416) = 6.584
  4. Absolute miss = |6.584| = 6.584

The poll overstated the Democrat by 6.6 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 53074, race ID 1296 (538 database).