Results for the Mid-October 2004 political survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 1,568 adults, 18 years of age or older, during the period October 15-19, 2004. For results based on registered voters (N=1,307) the sampling error is plus or minus 3 percentage points. If based on Form 1 or Form 2 registered voters only (Form 1 N=633 or Form 2 N=674), the sampling error is plus or minus 4.5 percentage points.<\/p>\n\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>","protected":false},"excerpt":{"rendered":"
Results for the Mid-October 2004 political survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 1,568 adults, 18 years of age or older, during the period October 15-19, 2004. For results based on registered voters (N=1,307) the sampling error is plus or minus 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