This study proposes a novel variance estimator \({\widehat{S}}_{Y,K}^{2}\) under two-phase sampling, utilizing one auxiliary variable and one binary attribute to enhance estimation efficiency.

Though conceptually appealing, it is impossible to fully account in practice for all the individual decisions and behaviors that constitute the nation’s water use. Nevertheless, statistical sampling ...

Accurate forest volume estimation is crucial for sustainable forest management, but the most commonly used methods often rely on models that may not always be applicable across different tree species ...