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2004 President · CO

Mason-Dixon Polling & Strategy · fieldwork ended 2004-10-28 (5 days before the election) · 625 respondents · Live Phone

The poll said

Democrat 43% · Republican 50%

R+7.0

The certified result

Democrat 47.04% · Republican 51.71%

R+4.7

The arithmetic

  1. Poll margin = 43 − 50 = -7.00
  2. Actual margin = 47.038 − 51.711 = -4.673
  3. Signed miss = -7.00 − (-4.673) = -2.327
  4. Absolute miss = |-2.327| = 2.327

The poll overstated the Republican by 2.3 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 4368, race ID 760 (538 database).