問(wèn)答題某試樣經(jīng)分析測(cè)得含錳質(zhì)量分?jǐn)?shù)(%)為:41.24,41.27,41.23,41.26。求分析結(jié)果的平均偏差、標(biāo)準(zhǔn)偏差和變異系數(shù)。

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