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2024 House · Pennsylvania

Noble Predictive Insights · fieldwork ended 2024-10-25 (11 days before the election) · 406 respondents · Live Phone/Text-to-Web

The poll said

Democrat 50% · Republican 43%

D+7.0

The certified result

Democrat 49.19% · Republican 50.81%

R+1.6

The arithmetic

  1. Poll margin = 50 − 43 = 7.00
  2. Actual margin = 49.188 − 50.812 = -1.624
  3. Signed miss = 7.00 − (-1.624) = 8.624
  4. Absolute miss = |8.624| = 8.624

The poll overstated the Democrat by 8.6 points and had the wrong leader.

Where these numbers come from

Poll and result: 538 house_polls_historical.csv (archived 2025-03-06). Poll ID 89069, race ID 9872 (538 database).

population: lv