The Big Day Dawneth
November 1st, 2010Whew, it’s almost over. Don’t forget to vote, and would you like to know who’s going to win?
So would we all.
There is a new poll. The survey by Rasmussen Reports shows Democrat Peter Shumlin ahead of Republican Brian Dubie by 50 to 45 percent, with three percent undecided and one percent supporting minor candidates.
The poll was taken of a randomly selected sample of 750 likely voters and has a margin of error of plus or minus four percentage points.
Do not despair, Dubie-ites. Just taking the poll at face value, it does not “prove” that Shumlin is going to win. Remember, another poll taken two weeks earlier, by anther firm, gave Dubie a one-point lead. Only the count of actual ballots tomorrow night will reveal the winner (and if the race is as close as was the Democratic Primary, more counting may be needed).
What is often forgotten is that a poll’s margin of error applies not to the “spread,” but to each candidate’s percentage of support. All this poll says is that had all 250,000 or so likely voters been polled, between 54 and 46 percent would have chosen Shumlin, between 49 and 41 percent would have opted for Dubie.
So if on Tuesday night Dubie ends up with 47 percent of the vote to Shumlin’s 46 percent, the poll would not have been wrong. The result would have been within the poll’s margin of error.
(And would require the State Legislature to elect a governor, a matter to be discussed here only if it happens, which it probably won’t).
But don’t be of too much good cheer, either, Dubie-ites. A poll’s reported results represent the midpoint of its findings, which is far more likely to reflect actual public opinion than either extreme. It’s as likely that Shumlin is really ahead 53-42 as that Dubie is ahead 47-46.
Now we come to the question of whether this poll should be taken at face value. The answer will offer no comfort to Dubie and the Republicans, but the question should be explored anyway.
Rasmussen polls have a slight Republican bias. This is not because proprietor Scott Rasmussen has a slight Republican bias. Rasmussen in fact has a colossal Republican bias. But he’s also, on the basis of the evidence at hand, a perceptive businessman (he helped found ESPN), and for the sake of his business, a pollster tries to make his polls accurate so that people take them seriously and continue to hire his firm. A series of inaccurate polls can put a pollster out of business.
But when a voter answers his or her phone because the Rasmussen folks are calling, an actual folk is not at the other end of the line. Instead, a recorded voice asks the respondent a question to be answered by pushing ‘one’ for candidate A, ‘two’ for candidate B, etc.
This ‘robocall’ technique is frowned on by the polling establishment at the American Association of Public Opinion Research . and scorned by several quality news organizations including the Washington Post and the New York Times. In fact, Rutgers University political scientist Cliff Zukin, in a paper he wrote last year for the AAPOR, argued that “these types of surveys have little claim of scientific validity and probably should not be reported.”
One reason for doubts about robocall polls is that they can not include random sampling within the household. A person on the phone can ask to speak to a woman or a man, or the person with the most recent birthday, or use some other method to try to get a representative sample.
But as Zukin noted, “If interviewers simply spoke with whoever answered the phone, the resulting samples would be older and more female than the population as a whole.”
That could be why robocall polls have been found to tilt about two percentage points more Republican than other surveys, or than the final election results.
On the other hand, Rasmussen polls don’t have a bad track record for accuracy. In the Massachusetts Senate race won by Republican Scott Brown earlier this year, Rasmussen polls picked up Brown’s growing strength earlier than other surveys.
With all the caveats, then, it’s fairly likely that Shumlin is ahead.
Which is not the same thing as predicting he will win. It might rain (though right now the Weather Channel is predicting pretty nice weather for both Burlington and Rutland on election day) and bad weather usually keeps more Democrats than Republicans away from the polls. The Republicans might have a better get-out-the-vote operation this year (though they usually don’t). And the poll could just be wrong. Sometimes, a poll is simply wrong. Polls, after all, are based on the laws of probability, not the laws of certainty.
Rasmussen is not the only outfit polling the race. So are both campaigns. “The campaign has maintained a consistent lead in our internal polling and as the campaigns (sic) momentum grows with each day we expect to win on Tuesday night,” said Dubie campaign manager Corry Bliss after the Rasmussen poll came out.
In the same statement, Bliss tried to argue that the Rasmussen poll showing Dubie behind by five points actually predicted an eight-point victory, because polls in 2002 had understated Vermont Republican strength by 13 points.
As responses go, this one was more inventive than persuasive.
Neither Bliss nor the Shumlin campaign revealed any numbers from their internal polling, requiring the curious to engage in tea-leaf reading to try to figure out what the polls might show.
Until the weekend, there were some signs that Dubie might be ahead. Conventional political strategy is to shift, in the final week or two, from television advertisements attacking the opposition to more positive ads, often featuring the candidate talking directly to the camera.
Last week the Shumlin campaign and its allies were still running anti-Dubie ads, while the Dubie campaign was featuring a spot called, “I’m your man” in which a blue-shirted, smiling, Dubie looked directly at the camera and promised to focus on jobs.
It’s a very effective ad even though its main point – “Vermont’s economy is in crisis” – is wrong. By all the usual criteria – economic growth (or, these days, shrinkage), unemployment rate, poverty rate, foreclosure rate – Vermont’s economy is less in crisis than that of most other states.
This would be the downside of a Dubie governorship—the constant (and, worse, inaccurate) griping about Vermont’s economy (there would be upsides, to be discussed later regardless of the outcome).
By the weekend, however, the Dubie campaign was back on the attack, including one ad – falsely accusing Shumlin of wanting to let prisoners out of jail – that has been widely criticized for being not just inaccurate but dishonest.
Considering that even many Republicans have been speculating that it is ads like this that seem to have put Dubie behind in the race, the decision to keep running it could be a sign of some desparation.
Maybe the Dubie campaign’s internal polls weren’t that different from the Rasmussen numbers.






