two-stage pretest estimator

例句：

1. 1. The two-stage pretest estimator is a useful tool for assessing the effectiveness of a new teaching method.
   两阶段预测试估计器是一种评估新教学方法有效性的有用工具。
2. 2.The teacher used this two-stage pretest estimator to identify areas where students needed additional support.
   老师使用这个两阶段预测试估计器来识别学生需要额外支持的领域。
3. 3. The two-stage pretest estimator helped the research team to refine their study design and improve its accuracy.
   这个两阶段预测试估计器帮助研究团队改进了他们的研究设计，提高了其准确性。