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2008 Senate · KY

YouGov · fieldwork ended 2008-10-25 (10 days before the election) · 486 respondents · Online Panel

The poll said

Democrat 42% · Republican 49%

R+7.0

The certified result

Democrat 47.03% · Republican 52.97%

R+5.9

The arithmetic

  1. Poll margin = 42 − 49 = -7.00
  2. Actual margin = 47.034 − 52.966 = -5.932
  3. Signed miss = -7.00 − (-5.932) = -1.069
  4. Absolute miss = |-1.069| = 1.069

The poll overstated the Republican by 1.1 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 16454, race ID 1556 (538 database).