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 ...

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 ...

Targeting matters most. Surveying the wrong audience can lead to misleading data and poor decisions, even if the questions themselves are solid. Weighting shapes reality. Overrepresenting certain ...

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 ...

Let us start with the biggest paradox. In all probability, you have never been interviewed for any of the opinion polls. How can the polls then claim to reflect ?public opinion?? The story goes that a ...

SURVEY is a computer program that simulates samples drawn from a hypothetical county. We use SURVEY in introductory and advanced sample survey classes to allow students to become involved in all ...

Journal of Field Archaeology, Vol. 13, No. 4 (Winter, 1986), pp. 477-491 (15 pages) In this paper several considerations are discussed that developed out of the sampling program for the Chevelon ...

A food sampling exercise found limited safety concerns but problems with declared meat content and added water. Findings come from a survey published by the Food Standards Agency (FSA), which helps ...