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2006 Senate · OH

Mason-Dixon Polling & Strategy · fieldwork ended 2006-11-01 (6 days before the election) · 625 respondents · Live Phone

The poll said

Democrat 50% · Republican 44%

D+6.0

The certified result

Democrat 56.16% · Republican 43.81%

D+12.3

The arithmetic

  1. Poll margin = 50 − 44 = 6.00
  2. Actual margin = 56.164 − 43.815 = 12.349
  3. Signed miss = 6.00 − (12.349) = -6.349
  4. Absolute miss = |-6.349| = 6.349

The poll overstated the Republican by 6.3 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 24354, race ID 1602 (538 database).