When that message comes from Uncle Sam, it’s often delivered in the form of a survey. The federal government amasses an astounding amount of data each year from nationally representative surveys on ...

Detecting gene–environment interactions with rare variants is critical in dissecting the etiology of common diseases. Interactions with rare haplotype variants (rHTVs) are of particular interest. At ...

Statistical modelling of complex survey data addresses the challenge of making valid inferences from samples collected under elaborate designs involving stratification, clustering and unequal ...

Any plant, biological, petrochemical or environmental sample can be considered to be a complex sample. By definition, a complex sample is a multicomponent sample that contains a wide variety of ...

Cochran (1977) outlines eleven steps in the planning of a survey. Good sampling methods must exist in the environment of all of these steps. These steps are (1) a statement of the survey objectives, ...