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 ...

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 ...

The sampling Moiré method is a non-contact optical technique that has gained prominence for its ability to precisely measure strain and deformation in various materials and structures. This method ...

Single cell sequencing experiments allow scientists to measure differences in gene expression to characterize cell types and quantify cell population heterogeneity. When analyzing tissue for oncology ...

Greg DePersio has 13+ years of professional experience in sales and SEO and 3+ years as a writer and editor. Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of ...

In today’s evidence-driven world, there is increasing demand for researchers with the skills to design, conduct, and evaluate studies that help institutions and schools improve their decision-making ...

Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.

Daniel McDonald and Jack Gilbert (both University of California, San Diego; CA, USA) discuss the challenges faced during fecal sample collection and highlight important factors to consider when ...

If a patient or research study volunteer is having a blood draw at or near a research facility that can perform this type of experiment on site, time delay doesn’t come into play. But for research ...