No more than 1 time in 20 should chance variations in the sample cause the results to vary by more than plus or minus 2.5 percentage points from the answers that would be obtained if all adults in the U.S. were polled. For NFL fans,China Jerseys Free Shipping, the margin of error is plus or minus 3.8 percentage points.
Interviews were conducted in both English and Spanish,Cheap NFL Jerseys Free Shipping.
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,nfl jerseys china, race, education and phone usage.
There are other sources of potential error in polls, including the wording and order of questions.
The poll had a cooperation rate of 47 percent.
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The survey included 836 self-identified NFL fans,Discount NFL Jerseys.
The original sample was drawn from a panel of respondents recruited via phone or mail survey methods. GfK provides Internet access to panel recruits who don't already have it. With a probability basis and coverage of people who otherwise couldn't access the Internet, online surveys using KnowledgePanel are nationally representative.
The Associated Press-GfK poll on the National Football League and domestic abuse was conducted by GfK Public Affairs and Corporate Communications Sept. 25-29. It is based on online interviews of 1,845 adults who are members of GfK's nationally representative KnowledgePanel.
