Results for this survey are based on telephone interviews conducted under the direction of Schulman, Ronca & Bucuvalas, Inc. among a nationwide sample of 1,503 adults, 18 years of age or older, from July 25-29, 2007.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=753) or Form 2 (N=750), one can say with 95% confidence that the error attributable to sampling is plus or minus 4 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 this survey are based on telephone interviews conducted under the direction of Schulman, Ronca & Bucuvalas, Inc. among a nationwide sample of 1,503 adults, 18 years of age or older, from July 25-29, 2007.For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is 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