Zogby International conducted an omnibus telephone survey
The sample is [1000 adult] interviews with approximately
 questions asked. Samples are randomly drawn from telephone
cds of national listed sample. Zogby International surveys
employ sampling strategies in which selection probabilities
are proportional to population size within area codes and
exchanges. Up to six calls are made to reach a sampled phone
number. Cooperation rates are calculated using one of AAPORs
approved methodologies[i] and are comparable to other professional
public-opinion surveys conducted using similar sampling strategies.[ii]
Weighting by [region, party, age, race, religion, gender]
is used to adjust for non-response. The margin of error is
+/- 3.2 percentage points. Margins of error are higher in
i See COOP4 (p.38) in Standard Definitions:
Final Dispositions of Case Codes and Outcome Rates of Surveys.
The American Association for Public Opinion Research, (2000).
ii Cooperation Tracking Study: April 2003 Update,
Jane M. Sheppard and Shelly Haas. The Council for Marketing
& Opinion Research (CMOR). Cincinnati, Ohio (2003).