On August 19th, 2022, the College of Graduate Studies (CGS), Walailak University (WU) managed the training entitled “Statistics – Sample and Sample Size Estimation” presented by Associate Professor Dr.Jaranit Kaewkungwal from Faculty of Tropical Medicine, Mahidol Unoversity – at AD3411, the 3rd floor, Architecture and Design Building, Walailak University simultaneously with the online Zoom Cloud Application. There were 33 participants from government, private and international organization.