1.
Audu Ahmed, Adedayo Amos Adewara, Ran Vijay Kumar Singh. Improved Class of Ratio Estimators for Finite Population Variance. GJSFR [Internet]. 2016 Jan. 15 [cited 2024 May 3];16(F2):17-24. Available from: https://journalofscience.org/index.php/GJSFR/article/view/1754