2014 House · NY-19
Siena College · fieldwork ended 2014-10-23 (12 days before the election) · 727 respondents · Live Phone
The poll said
Democrat 35% · Republican 58%
R+23.0
The certified result
Democrat 28.78% · Republican 48.55%
R+19.8
The arithmetic
- Poll margin = 35 − 58 = -23.00
- Actual margin = 28.777 − 48.546 = -19.769
- Signed miss = -23.00 − (-19.769) = -3.231
- Absolute miss = |-3.231| = 3.231
The poll overstated the Republican by 3.2 points and had the right leader.
Where these numbers come from
Poll and result: 538 raw_polls.csv. Poll ID 35908, race ID 5609 (538 database).