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2018_2019学年八年级数学下册第二十章数据的分析20.2数据的波动程度第1课时方差课件（新版）新人教版.ppt

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第二十章 数据的分析,20.2 第1课时 方差,学 习 指 南,知 识 管 理,归 类 探 究,分 层 作 业,当 堂 测 评,学 习 指 南,知 识 管 理,平均数,大,小,归 类 探 究,C,当 堂 测 评,C,C,D,20,分 层 作 业,A,A,A,90,6,C,B,8,7.5,

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