Results for this survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 1,505 adults, 18 years of age or older, from March 17-21, 2005. For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is plus or minus 3 percentage points. For results based on Form 1 (N=755) or Form 2 (N=750) only, the error attributable to sampling is plus or minus 4 percentage points.<\/p>\n
In addition to sampling error, one should bear in mind that question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of opinion polls.<\/p>\n","protected":false},"excerpt":{"rendered":"
Results for this survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 1,505 adults, 18 years of age or older, from March 17-21, 2005. For results based on the total sample, one can say with 95% confidence that the error attributable to sampling 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