對(duì)數(shù)變換
生物醫(yī)學(xué)

        以原數(shù)據(jù)的對(duì)數(shù)值作為統(tǒng)計(jì)分析的變量值,稱對(duì)數(shù)變換。當(dāng)原數(shù)據(jù)具有倍數(shù)的關(guān)系時(shí),其對(duì)數(shù)值將具有差數(shù)的關(guān)系,后者便于進(jìn)行統(tǒng)計(jì)分析。一般取常用對(duì)數(shù)變換:x=lgX。(1)M.S.Bartlett建議用式(2)作對(duì)數(shù)變換,尤其當(dāng)原數(shù)據(jù)中有小值以及零值    （共 965 字）     [閱讀本文] >>