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2000 President · national

Opinion Dynamics · fieldwork ended 2000-11-01 (6 days before the election) · 1,000 respondents · Live Phone

The poll said

Democrat 43% · Republican 43%

even

The certified result

Democrat 48.15% · Republican 47.66%

D+0.5

The arithmetic

  1. Poll margin = 43 − 43 = 0.00
  2. Actual margin = 48.149 − 47.657 = 0.492
  3. Signed miss = 0.00 − (0.492) = -0.492
  4. Absolute miss = |-0.492| = 0.492

The poll overstated the Republican by 0.5 points and showed a tie.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 28068, race ID 40 (538 database).