How the AP-GfK poll was conducted

Posted at: 12/07/2012 12:05 PM
The Associated Press

The Associated Press-GfK poll on President Obama and politics was conducted by GfK Roper Public Affairs & Corporate Communications from Nov. 29 to Dec. 3. It is based on landline telephone and cellphone interviews with a nationally representative random sample of 1,002 adults. Digits in the phone numbers dialed were generated randomly to reach households with unlisted and listed landline and cellphone numbers.

Interviews were conducted in both English and Spanish.

As is done routinely in surveys, results were weighted, or adjusted, to ensure that responses accurately reflect the population’s makeup by factors such as age, sex, education and race. In addition, the weighting took into account patterns of phone use _ landline only, cell only and both types _ by region.

No more than 1 time in 20 should chance variations in the sample cause the results to vary by more than plus or minus 3.9 percentage points from the answers that would be obtained if all adults in the U.S. were polled.

There are other sources of potential error in polls, including the wording and order of questions.

The questions and results are available at http://www.ap-gfkpoll.com.

(Copyright 2012 by The Associated Press. All Rights Reserved.)

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