- It is shown that the proposed mean imputation estimators are asymptoyically normal.
证明了它们具有渐近正态性，并进行了模拟研究。
- Under some regular conditions, a proposed estimator is proved to be asymptotically normal and convergent rate.
在一些正则条件下证明了该估计量的渐近正态性，同时给出估计量的收敛速度。
