kelticwizard wrote:Well, how do you know that Zogby doesn't have it right and the other polls are off the mark?
Hypothetically possible but not likely.
If, say, 12 polls with established methodologies all have one's job approval at, say, 35-40% but a thirteenth poll has it at 30%, or 45%, it's common practice to consider the latter an "outlier". If the thirteenth poll consistently is off x% on what all the other polls are saying, to say that it "errs" on one side of the question like Thomas did is completely standard practice.
(Mind you, I did not include Zogby in my graph because it phrased the question differently so got entirely different results altogether, so I cant say much about Zogby in particular, but in the case of Fox the trend is clear.)