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2004 President · NV

Mason-Dixon Polling & Strategy · fieldwork ended 2004-10-17 (16 days before the election) · 625 respondents · Live Phone

The poll said

Democrat 42% · Republican 52%

R+10.0

The certified result

Democrat 47.88% · Republican 50.47%

R+2.6

The arithmetic

  1. Poll margin = 42 − 52 = -10.00
  2. Actual margin = 47.878 − 50.470 = -2.592
  3. Signed miss = -10.00 − (-2.592) = -7.408
  4. Absolute miss = |-7.408| = 7.408

The poll overstated the Republican by 7.4 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 4686, race ID 788 (538 database).