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Floridatexan wrote:Markle, you know the Rasmussen poll is notoriously biased. Try again. The so-called Ryan Medicare plan is nothing more than the same old voucher based system, which would do nothing whatever to control costs or to extend medical care to the 45 million people who have none.
Then why are they most often accurate? Simple, they poll LIKELY VOTERS rather than anyone or Registered Voters.
Poll Accuracy in the 2008 Presidential Election
—Initial Report, November 5, 2008—
Costas Panagopoulos, Ph.D.
Department of Political Science
Fordham University
For inquiries: cpanagopoulo@fordham.edu or (917) 405-9069
For all the derision directed toward pre-election polling, the final poll estimates were not far off from the actual nationwide voteshares for the two candidates. On average, preelection polls from 23 public polling organizations projected a Democratic advantage of 7.52 percentage points on Election Day, which is only about 1.37 percentage points away from the current estimate of a 6.15-point Obama margin in the national popular vote.
Following the procedures proposed by Martin, Traugott and Kennedy. (see Public Opinion Quarterly Fall, 2006, pp. 342-369) to assess poll accuracy, I analyze poll estimates from these 23 polling organizations. Four of these polls appear to have overestimated McCain support (indicated with a * below), while most polls (17) overestimated Obama strength.
Pre-election projections for two organizations’ final polls—Rasmussen and Pew—were perfectly in agreement with the actual election result (**).
The following list ranks the 23 organizations by the accuracy of their final, national preelection polls (as reported on pollster.com).
1. Rasmussen (11/1-3)**
1. Pew (10/29-11/1)**
2. YouGov/Polimetrix (10/18-11/1)
3. Harris Interactive (10/20-27)
4. GWU (Lake/Tarrance) (11/2-3)*
5. Diageo/Hotline (10/31-11/2)*
5. ARG (10/25-27)*
6. CNN (10/30-11/1)
6. Ipsos/McClatchy (10/30-11/1)
7. DailyKos.com (D)/Research 2000 (11/1-3)
8. AP/Yahoo/KN (10/17-27)
9. Democracy Corps (D) (10/30-11/2)
10. FOX (11/1-2)
11. Economist/YouGov (10/25-27)
12. IBD/TIPP (11/1-3)
13. NBC/WSJ (11/1-2)
14. ABC/Post (10/30-11/2)
15. Marist College (11/3)
16. CBS (10/31-11/2)
17. Gallup (10/31-11/2)
18. Reuters/ C-SPAN/ Zogby (10/31-11/3)
19. CBS/Times (10/25-29)
20. Newsweek (10/22-23)
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