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2010 Governor · CT

Scott Rasmussen (Rasmussen Reports) · fieldwork ended 2010-10-23 (10 days before the election) · 1,000 respondents · IVR

The poll said

Democrat 47% · Republican 44%

D+3.0

The certified result

Democrat 47.21% · Republican 48.95%

R+1.7

The arithmetic

  1. Poll margin = 47 − 44 = 3.00
  2. Actual margin = 47.213 − 48.950 = -1.737
  3. Signed miss = 3.00 − (-1.737) = 4.737
  4. Absolute miss = |4.737| = 4.737

The poll overstated the Democrat by 4.7 points and had the wrong leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 32665, race ID 1280 (538 database).