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2006 House · PA-10

RT Strategies · fieldwork ended 2006-10-25 (13 days before the election) · 442 respondents · Live Phone

The poll said

Democrat 50% · Republican 43%

D+7.0

The certified result

Democrat 52.90% · Republican 47.01%

D+5.9

The arithmetic

  1. Poll margin = 50 − 43 = 7.00
  2. Actual margin = 52.896 − 47.010 = 5.886
  3. Signed miss = 7.00 − (5.886) = 1.114
  4. Absolute miss = |1.114| = 1.114

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

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 64244, race ID 3930 (538 database).