Author: Edward Ugarte Economist and econometrician specializing in sampling methods, statistical modeling, and open-source software development. Package Description This package integrates advanced sampling methods with finite population corrections, improving statistical estimation accuracy within Gretl. Key Features ��� Optimized sample size calculation, considering finite and infinite populations. ��� Dynamic error margin adjustments for proportion and deviation estimations. ��� Modular integration within Gretl, ensuring clarity and usability. Compatibility ���� Tested on Gretl version 2025a. ���� Designed for easy implementation and efficient use within Gretl���s framework. Author's Background As an economist and developer of econometric tools, I have worked on sampling method optimization, advanced function integration in Gretl, and creating packages to simplify complex statistical analyses in open-source environments. My focus is on accessibility and usability to benefit researchers and analysts. Installation 1������ Load the file into Gretl using the import package option. 2������ Run the scripts following the usage instructions included in the package.