Panichkitkosolkul W. An Improved Confidence Interval for The Difference between Standard Deviations of Normal Distributions Using a Ranked Set Sampling. jst [Internet]. 2020 Jun. 21 [cited 2024 Jul. 23];12(1):29-40. Available from: https://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/6106