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2024 Senate · Pennsylvania

YouGov · fieldwork ended 2024-10-31 (5 days before the election) · 982 respondents · Online Matched Sample

The poll said

Democrat 50% · Republican 43%

D+7.0

The certified result

Democrat 48.60% · Republican 48.82%

R+0.2

The arithmetic

  1. Poll margin = 50 − 43 = 7.00
  2. Actual margin = 48.601 − 48.818 = -0.217
  3. Signed miss = 7.00 − (-0.217) = 7.217
  4. Absolute miss = |7.217| = 7.217

The poll overstated the Democrat by 7.2 points and had the wrong leader.

Where these numbers come from

Poll and result: 538 senate_polls_historical.csv (archived 2025-03-06). Poll ID 89204, race ID 9527 (538 database).

This poll asked 2 versions of the question for this race; one is scored (largest sample) so the poll counts once.

population: rv