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样本中含有总体信息，但较为分散，一般不宜直接用于统计推断，常常是把样本中的信息加工处理，用样本的函数形式集中起来，这类不含总体分布的任何未知参数的样本函数称为统计量，用于统计推断。
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＞分析化学＞化学计量学＞释义
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water quality of water supply
water quality protection measures
water quality sampling
water quality speciation
water quality standard
water quality standard for farmland irrigation
Water Quality Standard for Fisheries
water quality standard for landscape and recreation
water quality standards
water quality station
water quality testing center
water quantity measurement
water reclaimed of tailings pond
waterreclaimed plant
water reclamation
water-reducing admixture
water reducing admixture and plasticizer for concrete
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water related administrative fees
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