Ahmad A. APPLICATION OF PRINCIPAL COMPONENT ANALYSIS METHOD ON TUTOR PERFORMANCE ASSESSMENT INSTRUMENTS WITH JEFFREYS’S AMAZING STATISTICS PROGRAM FORMULA. jisae [Internet]. 2022Sep.18 [cited 2024May11];8(2):144 -151. Available from: https://journal.unj.ac.id/unj/index.php/jisae/article/view/29453