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2022 Governor · IA

Selzer & Co. · fieldwork ended 2022-11-02 (6 days before the election) · 801 respondents · Live Phone

The poll said

Democrat 37% · Republican 54%

R+17.0

The certified result

Democrat 39.53% · Republican 58.04%

R+18.5

The arithmetic

  1. Poll margin = 37 − 54 = -17.00
  2. Actual margin = 39.526 − 58.042 = -18.516
  3. Signed miss = -17.00 − (-18.516) = 1.517
  4. Absolute miss = |1.517| = 1.517

The poll overstated the Democrat by 1.5 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 81560, race ID 8964 (538 database).