This Energy IQ survey was conducted online within the United States by Harris Interactive on behalf of API between June 3 and June 12, 2008 among 1,528 adults (aged 18 and over). Results were weighted for region, age within gender, education, household income and race/ethnicity where necessary to align them with their actual proportions in the population.

All sample surveys and polls, whether or not they use probability sampling, are subject to multiple sources of error which are most often not possible to quantify or estimate, including sampling error, coverage error, error associated with nonresponse, error associated with question wording and response options, and post-survey weighting and adjustments. Therefore, Harris Interactive avoids 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, random samples with 100% response rates. These are only theoretical because no published polls come close to this ideal.

Harris Interactive is a global leader in custom market research. With a long and rich history in multimodal research that is powered by our science and technology, we assist clients in achieving business results. Harris Interactive serves clients globally through our North American, European and Asian offices and a network of independent market research firms. For more information, please visit www.harrisinteractive.com.