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2010 Governor · FL

Public Policy Polling · fieldwork ended 2010-10-30 (3 days before the election) · 773 respondents · IVR

The poll said

Democrat 48% · Republican 47%

D+1.0

The certified result

Democrat 47.72% · Republican 48.87%

R+1.1

The arithmetic

  1. Poll margin = 48 − 47 = 1.00
  2. Actual margin = 47.722 − 48.871 = -1.149
  3. Signed miss = 1.00 − (-1.149) = 2.148
  4. Absolute miss = |2.148| = 2.148

The poll overstated the Democrat by 2.1 points and had the wrong leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 1066, race ID 1281 (538 database).