The Consumer Reports Survey Team conducted a nationally representative survey in May 2018, to assess US adults’ attitudes and viewpoints on vehicle fuel economy. This survey was administered online from May 16 to May 30, 2017, to a nationally representative sample of 1,200 U.S. residents,18 years of age and older, who are members of GfK’s KnowledgePanel. The 1,094 respondents who screened in to the main survey are currently licensed drivers who own a vehicle. KnowledgePanel members are randomly recruited through probability-based sampling to be representative of the U.S. population. Data are weighted based on demographic and geographic benchmarks established by the most recent U.S. Census Bureau’s and U.S. Bureau of Labor Statistics’ Current Population Survey.
The margin of error for the sample of 1,200 U.S. residents is approximately +/- 3% at the 95% confidence level.