Discover how simple random sampling ensures accurate and unbiased population research, offering efficiency and fairness over ...

Discover how attribute sampling enhances audit accuracy by evaluating internal controls and analyzing population traits, ...

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 ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

The first video in our “Methods 101” series is about random sampling, a concept that undergirds all probability-based survey research. Here’s how it works. Fresh data delivered Saturday mornings Thank ...

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 ...

Consumers love free samples. And while retailers and manufacturers recognize sampling as an important marketing strategy, until now few understood sampling’s effectiveness. PromoWorks commissioned an ...

New research has led to a model that assesses the short- and long-term effects of in-store product sampling on sales of both the products offered on sample and competitive products. In big box stores, ...

In-store samples increase sales, both in the immediate and extended time frame. Sampling drives sharper and more sustained sales than end-of-aisle displays. If incremental cost of a sampling event ...

Drones have been used to successfully collect samples from the exhaled breath—or "blow"—from wild humpback, sperm and fin whales in northern Norway, hailing a new era of non-invasive health monitoring ...