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2014 Governor · SD

Monmouth University Polling Institute · fieldwork ended 2014-10-26 (9 days before the election) · 429 respondents · Live Phone

The poll said

Democrat 29% · Republican 68%

R+39.0

The certified result

Democrat 25.43% · Republican 70.47%

R+45.0

The arithmetic

  1. Poll margin = 29 − 68 = -39.00
  2. Actual margin = 25.432 − 70.467 = -45.035
  3. Signed miss = -39.00 − (-45.035) = 6.035
  4. Absolute miss = |6.035| = 6.035

The poll overstated the Democrat by 6.0 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 34244, race ID 1229 (538 database).