Many operations carried out by official statistical institutes use large-scale surveys obtained by stratified random sampling without replacement. Variables commonly examined in this type of surveys ...

Stratified sampling is used to select a sample that is representative of different groups. If the groups are of different sizes, the number of items selected from each group will be proportional to ...

This GitHub entry is meant to be a generalized version of the stratified sampling method used to split incoming datasets between the Open, publicly available MIDRC data (80%) and Sequestered, private ...

比估计和回归估计：利用辅助变量（如Test7成绩）进行比估计和回归估计。 Lasso回归：处理多重共线性问题，用于回归插补 ...