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1998 Governor · CA

Harris Insights & Analytics · fieldwork ended 1998-10-30 (4 days before the election) · 5,735 respondents · Live Phone

The poll said

Democrat 53% · Republican 42%

D+11.0

The certified result

Democrat 57.97% · Republican 38.38%

D+19.6

The arithmetic

  1. Poll margin = 53 − 42 = 11.00
  2. Actual margin = 57.968 − 38.377 = 19.591
  3. Signed miss = 11.00 − (19.591) = -8.591
  4. Absolute miss = |-8.591| = 8.591

The poll overstated the Republican by 8.6 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 54218, race ID 1436 (538 database).