Michigan State University's Food Literacy and Engagement Poll reports on consumer knowledge and opinions on issues related to food access, sustainability and more. Results provide an impartial and authoritative source of public perspectives on food to inform and guide discussion at Our Table and Food@MSU.
The Michigan State University Food Literacy and Engagement Poll was conducted online between July 6 and 8, 2017, among 1,059 U.S. residents aged 18 and over. Figures for age, sex, race/ethnicity, education, region and household income were weighted where necessary to bring them into line with their actual proportions in the population. A propensity score weighting approach was also used to adjust for respondents’ propensity to answer online surveys. The poll is administered by Toluna, NA, a leader in online research that manages one of the world’s largest internet-based research panels with more than 4.5 million registered and active users.
All surveys are subject to multiple sources of error. Most of these errors are often impossible to quantify. In addition to sampling error, these errors include coverage error, non-response error, interviewer bias when appropriate, and the error associated with how a question is asked or the response options given. Therefore, it is advisable to avoid the words “margin of error” as they are misleading. All that can be calculated are different possible sampling errors with different probabilities for pure, unweighted probability samples with 100 percent response rates. These are only theoretical because no published polls come close to this ideal. If this were the case, with a sample size of 1,059 and weighting efficiency of 82.2 percent, the overall margin of error would be 3 percentage points at the widest interval.
© 2017 Michigan State University