2006 Senate · MD
SurveyUSA · fieldwork ended 2006-11-01 (6 days before the election) · 694 respondents · IVR
The poll said
Democrat 47% · Republican 47%
even
The certified result
Democrat 54.21% · Republican 44.20%
D+10.0
The arithmetic
- Poll margin = 47 − 47 = 0.00
- Actual margin = 54.206 − 44.195 = 10.011
- Signed miss = 0.00 − (10.011) = -10.010
- Absolute miss = |-10.010| = 10.010
The poll overstated the Republican by 10.0 points and showed a tie.
Where these numbers come from
Poll and result: 538 raw_polls.csv. Poll ID 24819, race ID 1589 (538 database).