...iiniYnEY(E1)1 () 有效性(Efficiency)• 一个估计量W的方差Var(W), 称为它的抽样方差(sampling variance),抽样方差是一个常数。
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分层抽样方差 variance for stratified sampling
多阶抽样方差 variance for multi-stage sampling
整群抽样方差 variance for cluster sampling
简单随机抽样方差 variance for simple random sampling
整群抽样协方差 [统计] covariance for cluster sampling
分层抽样协方差 [统计] covariance for stratified sampling
简单随机抽样协方差 [统计] covariance for simple random sampling
初级抽样单位内的方差 variance within primary sample units ; within-psu variances
整群抽样的方差估计值 variance estimates for cluster sampling
在期权定价的蒙特卡罗模拟中，重要性抽样是一种有效的方差减小技术。
Importance sampling technique is an effective variance reduction technique in Monte Carlo simulation method for pricing options.
复合重要抽样可以减小计算方差，提高计算效率。
Calculation variance can be reduced by multiple important sampling technique, and then calculation efficiency can be improved.
在一系列不同的极限状态函数条件下，对随机抽样法和拉丁超立方抽样法以及是否使用方差减缩技术进行了比较研究。
Comparative study on random sampling and Latin hypercube sampling with and without variance reduction techniques is carried out to a number of different limit state functions.
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