Coefficients of variation for nominal and ordinal categorical-data . Percept Mot Skills . 1995; 80 :843–847.Kvalseth, T. O. (1995a). Coefficients of variation for nominal and ordinal categorical data. Perceptual and Motor Skills, 80, 843-847....
按A, B, C, D,E打分的考试成绩数据属于:A.数值型(连续)B.数值型(离散)C.序数型(Ordinal)D.标称型(Nominal)E.字符串