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2012 Senate · OH

Scott Rasmussen (Rasmussen Reports) · fieldwork ended 2012-10-28 (9 days before the election) · 750 respondents · IVR/Online Panel

The poll said

Democrat 50% · Republican 48%

D+2.0

The certified result

Democrat 50.70% · Republican 44.70%

D+6.0

The arithmetic

  1. Poll margin = 50 − 48 = 2.00
  2. Actual margin = 50.701 − 44.700 = 6.001
  3. Signed miss = 2.00 − (6.001) = -4.001
  4. Absolute miss = |-4.001| = 4.001

The poll overstated the Republican by 4.0 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 30411, race ID 1494 (538 database).