variance for simple random sampling
...le sampling without replacement : 简单不放回抽样，简单不重复抽样 variance for simple random sampling : 简单随机抽样方差 precision of simple random sampling : 简单随机抽样精度 ..
基于2个网页-相关网页
短语
简单随机抽样协方差
[统计]
covariance for simple random sampling