A.均值 B.中位數(shù) C.眾數(shù) D.調(diào)和平均數(shù)
A.對數(shù)據(jù)做歸一化處理 B.對數(shù)據(jù)做z-score標(biāo)準(zhǔn)化 C.對數(shù)據(jù)取對數(shù) D.以上都是
A.1 B.2 C.3 D.4