Methods: Retrospectively analyzing monitoring data in 2006 by descriptive statistic method.

方法运用描述性统计学方法回顾性分析2006年北京市出生缺陷监测资料.

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Statistic method is used to study drilling cost and its regularity changing.

应用概率统计的方法研究了小井眼钻井成本及其变化规律.

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Distinguishable analysis is a statistic method to distinguish which kind the sample belongs to.

判别分析是判别样品所属类型的一种统计方法.

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