About the Study
These are findings from an Ipsos poll conducted November 29-30, 2018. For the survey, a sample of 1,002 adults 18+ from the continental U.S., Alaska, and Hawaii were interviewed online in English. The sample includes 339 Democrats, 357 Republicans, and 191 Independents.
The sample for this study was randomly drawn from Ipsos’ online panel (see link below for more info on “Access Panels and Recruitment”), partner online panel sources, and “river” sampling (see link below for more info on the Ipsos “Ampario Overview” sample method) and does not rely on a population frame in the traditional sense. Ipsos uses fixed sample targets, unique to each study, in drawing a sample. After a sample has been obtained from the Ipsos panel, Ipsos calibrates respondent characteristics to be representative of the U.S. Population using standard procedures such as raking-ratio adjustments. The source of these population targets is U.S. Census 2016 American Community Survey data. The sample drawn for this study reflects fixed sample targets on demographics. Post-hoc weights were made to the population characteristics on gender, age, race/ethnicity, region, and education.
Statistical margins of error are not applicable to online polls. All sample surveys and polls may be subject to other sources of error, including, but not limited to coverage error and measurement error. Where figures do not sum to 100, this is due to the effects of rounding. The precision of Ipsos online polls is measured using a credibility interval. In this case, the poll has a credibility interval of plus or minus 3.5 percentage points for all respondents. Ipsos calculates a design effect (DEFF) for each study based on the variation of the weights, following the formula of Kish (1965). This study had a credibility interval adjusted for design effect of the following (n=1,010, DEFF=1.5, adjusted Confidence Interval=+/-5.0 percentage points).
This study also has a credibility interval of 6.1 percentage points for Democrats, 5.9 percentage points for Republicans, and 8.1 percentage points for Independents.
For more information on this news release, please contact:
Vice President, U.S.
Ipsos Public Affairs
+1 202 420-2025
Ipsos Public Affairs
+1 202 420-2014
About Ipsos Public Affairs
Ipsos Public Affairs is a non-partisan, objective, survey-based research practice made up of seasoned professionals. We conduct strategic research initiatives for a diverse number of American and international organizations, based not only on public opinion research, but elite stakeholder, corporate, and media opinion research.
Ipsos has media partnerships with the most prestigious news organizations around the world. Through our media partnerships, Ipsos Public Affairs is a leading source of intelligent information for businesses and professionals in the U.S., Canada, the UK, and internationally. Ipsos Public Affairs is a member of the Ipsos Group, a leading global survey-based market research company. We provide boutique-style customer service and work closely with our clients, while also undertaking global research.
Ipsos is an independent market research company controlled and managed by research professionals. Founded in France in 1975, Ipsos has grown into a worldwide research group with a strong presence in all key markets. Ipsos ranks fourth in the global research industry.
With offices in 88 countries, Ipsos delivers insightful expertise across five research specializations: brand, advertising and media; customer loyalty; marketing; public affairs research; and survey management.
Ipsos researchers assess market potential and interpret market trends. They develop and build brands. They help clients build long-term relationships with their customers. They test advertising and study audience responses to various media and they measure public opinion around the globe.
Ipsos has been listed on the Paris Stock Exchange since 1999 and generated global revenues of €1,780.5 million in 2017.