Banik, S., Albatineh, A. N., Abu-Shawiesh, M. O. A., & Golam Kibria, B. M. (2014). Estimating the Population Standard Deviation with Confidence Interval: A Simulation Study under Skewed and Symmetric Conditions. International Journal of Statistics in Medical Research, 3(4), 356–367. https://doi.org/10.6000/1929-6029.2014.03.04.4