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2002 Governor · CA

Tarrance Group · fieldwork ended 2002-10-28 (8 days before the election) · 500 respondents · Live Phone · partisan sponsor (REP)

The poll said

Democrat 42% · Republican 39%

D+3.0

The certified result

Democrat 47.26% · Republican 42.40%

D+4.9

The arithmetic

  1. Poll margin = 42 − 39 = 3.00
  2. Actual margin = 47.262 − 42.398 = 4.864
  3. Signed miss = 3.00 − (4.864) = -1.865
  4. Absolute miss = |-1.865| = 1.865

The poll overstated the Republican by 1.9 points and had the right leader.

Where these numbers come from

Poll and result: 538 raw_polls.csv. Poll ID 54596, race ID 1385 (538 database).