ใช้มาตรวัดเดียวกันกับคนกลุ่มเดียวกันในเวลาต่างกัน A Observe within the equivalence of KR20 and Cronbach’s alpha for dichotomous info: These are sometimes stated to generally be precisely equivalent; nonetheless, algebraic equivalence only occurs in the event the biased estimator in the sample variance which divides by the quantity of topics n is utilized for Var(Xi) https://thomasg802fee4.wikiusnews.com/user