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2004 President · LA

Market Research Insight · fieldwork ended 2004-10-18 (15 days before the election) · 600 respondents · Live Phone

The poll said

Democrat 37% · Republican 52%

R+15.0

The certified result

Democrat 42.22% · Republican 56.72%

R+14.5

The arithmetic

  1. Poll margin = 37 − 52 = -15.00
  2. Actual margin = 42.216 − 56.722 = -14.506
  3. Signed miss = -15.00 − (-14.506) = -0.494
  4. Absolute miss = |-0.494| = 0.494

The poll overstated the Republican by 0.5 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 4614, race ID 773 (538 database).