... biased sample 偏性样本 biased sampling 偏性抽样 biased statistic 有偏统计量 ...
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(3) 若抽样方法为“有偏抽样”(biased sampling)，必须能正 确的对偏倚性进行计算加以校正。
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缺点：①费时费力 ②样本偏差（biased sampling）与被试流失
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length biased sampling [数] 长度偏倚抽样
length-biased sampling 长度偏倚 ; 持续期间偏差抽样
biased sampling method 偏性抽样法
common biased sampling 通有偏取样 ; 普通有偏取样
biased sampling models 有偏模型
density biased sampling 密度偏差抽样
biased random sampling 基于偏好的随机抽样
sampling biased 有歧视性抽样
·2,447,543篇论文数据，部分数据来源于NoteExpress
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
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Microsoft hotly contested this, and claimed Mr Weadock's sampling was biased.
BBC: USA versus Microsoft: The fifth week
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