group index

例句：

1. 1. The groupindex is a measure of how well the group performs in comparison to its peers.
   群组指数是一个衡量该群体相对于其同伴表现如何的指标。
2. 2.In this study, we used the group index to evaluate the effectiveness of our intervention.
   在这项研究中，我们使用群组指数来评估我们的干预措施的有效性。
3. 3.The group index was calculated based on the data collected from the survey.
   群组指数是根据调查收集的数据计算得出的。