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2016 House · NH-2

YouGov · fieldwork ended 2016-10-19 (20 days before the election) · 382 respondents · Online Panel

The poll said

Democrat 53% · Republican 42%

D+11.0

The certified result

Democrat 49.75% · Republican 45.31%

D+4.4

The arithmetic

  1. Poll margin = 53 − 42 = 11.00
  2. Actual margin = 49.748 − 45.313 = 4.435
  3. Signed miss = 11.00 − (4.435) = 6.565
  4. Absolute miss = |6.565| = 6.565

The poll overstated the Democrat by 6.6 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 47326, race ID 6012 (538 database).