已知有一组数据:21,20,20,21,23,22,22,22,21,22,20,23,22,23,22,19,22,23,24,22,19,22,21,21,21,22,22,24,22,21,22,21,22,23,22,22,21,22,22,23,22,23,22,22,22,23,23,22,21,22,试用Excel求其样本方差为( )。 选项: A:1.13 B:2.13 C:3.13 D:4.13 已知 数据 试用 发布时间:2024-04-01 19:44:37