The margin of error could vary from point to point on trend lines. It is advisable to determine the margin of error by considering the sample size of each study.
Results may not total 100% in all cases because of rounding.
In the event you obtain results that are significantly different from published results (e.g., a result that is three percentage points higher or lower), you should contact the Gallup Permissions Department. We will investigate the discrepancy and contact you with our findings and the correct result.
When creating a trend line, ensure that you are using the same base question and studying the same population. Trends of different questions and different populations will lead to erratic and erroneous results and analysis.
If you intend to publish trended results from your search, you must verify your results with the Gallup Permissions Department. We will promptly respond to your verification inquiry.
If you intend to simply publish a single result in the form of a contextual citation, verification and permission are not required. You will need to state the poll results in a manner similar to this; "...about two out of every three Americans (65%) claim to be... (Gallup Poll MMM DD-DD 'YY)" or "...according to a MMM DD-DD 'YY Gallup Poll, two-thirds of Americans feel that..." The important point to cite (beside the statistic itself) is the survey dates within the sentence. We would also appreciate a footnote with complete interviewing dates and sample sizes and the inclusion of a URL that links directly to the data you are mentioning.
