Note: This report was updated on Dec. 30, 2015 to reflect the January-July 2015 National Health Interview Survey estimates released on December 1, 2015. Telephone surveys face numerous challenges, but ...

One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting ...

Survey sampling and estimation methods form the cornerstone of modern statistical inference, underpinning research across the social, medical, and natural sciences. At their heart, these methods ...

The Public Opinion Quarterly, Vol. 82, No. 4 (Winter 2018), pp. 707-744 (38 pages) Many studies in various countries have found that telephone and internet surveys of probability samples yielded data ...

Journal of Agricultural, Biological, and Environmental Statistics, Vol. 24, No. 1 (March 2019), pp. 26-48 (23 pages) When conducting a national survey or census, administrative data may be available ...

Do you know what worms and other hidden creatures are living in your soil? You might be amazed by the diversity and importance of these organisms for your garden. If you'd like to learn more about the ...