This paper reports how three field sampling methods performed in different rooms and on different surface types and how they compare using two different metrics of concentration (μg/g) and loading (μg ...

Our third Methods 101 video explores some of the ways that nonprobability surveys differ from traditional probability-based polls. How do pollsters conduct surveys online and what does that mean for ...

Vascular epiphytes are an important component of tropical biodiversity; however, because of problems associated with accessing them, it is hard to obtain a complete species inventory. It is faster and ...

Non-invasive sampling methods include saliva analysis, hair analysis, urinalysis, and breath testing. <br/>The importance of ...

Here at Pew Research Center, we are often asked about how we conduct our research. We work hard to make our methodologies transparent and understandable, but we also know that survey mode effects and ...

The USDA’s Food Safety and Inspection Service is continuing its sampling plan and has published updates for the 2025 fiscal year. The plan is designed to leverage technological and sampling advances ...

According to Phys.org, which relayed the university's findings, the scientists looked at the meat from six different fish and crustaceans: black rockfish, lingcod, Chinook salmon, Pacific herring, ...

Lio et al (2010a, b) introduced two single acceptance sampling plans (SASPs) for the percentiles of Birnbaum-Saunders and Burr type XII distribution with a truncated censoring scheme. They assured ...