Suleiman SA, Adewara AA. Improved Modified Ratio Estimation of Population Mean Using Information on Size of the Sample . Tanz. J. Sci. [Internet]. 2021 Dec. 31 [cited 2025 Apr. 3];47(5):1753-65. Available from: https://tjs.udsm.ac.tz/index.php/tjs/article/view/961