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

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 ...

If you would like to learn more about the IAEA’s work, sign up for our weekly updates containing our most important news, multimedia and more. This publication, edited by Stéfan Arnórsson, is designed ...

This study looks at how national public opinion polling in the United States changed from 2000 to 2022. It focuses on two aspects: the sample source(s) – that is, where the survey takers came from – ...

Agricultural soil testing is critical to determining soil’s nutrient concentration and variability across your fields. It is ideal to test your fields’ soil at least every two to three years to inform ...

Material identification and analysis are crucially important within the forensic analysis field. Similarly to how there is no pre-determined set of materials that comprises all forensic lab analytes, ...