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2020 President · FL

YouGov · fieldwork ended 2020-10-22 (12 days before the election) · 1,228 respondents · Online Panel

The poll said

Democrat 50% · Republican 48%

D+2.0

The certified result

Democrat 47.86% · Republican 51.22%

R+3.4

The arithmetic

  1. Poll margin = 50 − 48 = 2.00
  2. Actual margin = 47.861 − 51.220 = -3.359
  3. Signed miss = 2.00 − (-3.359) = 5.358
  4. Absolute miss = |5.358| = 5.358

The poll overstated the Democrat by 5.4 points and had the wrong leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 71887, race ID 6220 (538 database).