New research suggests oysters may rely on hidden microbes to help build their shells and maintain chemistry as oceans grow ...

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

Abstract: In this study, we suggested an improved ratio estimator for stratification utilizing an auxiliary variable in simple random sampling. Theoretically, bias ...

More simple cola-based experiments explained highlight playful chemistry concepts. Shoppers alarmed by what's happening at malls: "Living in hell" US military refueling plane crashes in Iraq: What to ...