February 21, 2011, 5:36 pm
Rasmussen Poll on Wisconsin Dispute May Be Biased
By NATE SILVER
We’ve noted before that the automated polling firm Rasmussen Reports has had problems with bias in a statistical sense: in the election last fall, its polls overestimated the standing of Republican candidates by roughly 4 percentage points on average.
A somewhat different issue arises today in a poll the firm conducted on the dispute in Wisconsin between Gov. Scott Walker and some of the state’s public-employee unions.
The poll, which included people that Rasmussen deemed to be “likely voters” from across the country, found that 48 percent of respondents agreed more with Mr. Walker in the dispute, while 38 percent agreed more with “the union for teachers and other state employees.”
That question, though, was the fourth one Rasmussen asked in the survey — and the questions that came before it may have biased the responses ...
http://fivethirtyeight.blogs.nytimes.com/2011/02/21/rasmussen-poll-on-wisconsin-dispute-may-be-biased/