已知一组数据14, 15, 15, 16, 19, 20, 20, 21, 22, 23, 25, 25, 25, 25, 29, 31, 34, 35, 35, 35, 35, 37, 40, 45, 47, 52, 70,其下四分位数Q3是
举一反三
- 【单选题】已知一组数据14, 15, 15, 16, 19, 20, 20, 21, 22, 23, 25, 25, 25, 25, 29, 31, 34, 35, 35, 35, 35, 37, 40, 45, 47, 52, 70,其上四分位数Q1是()。 A. 14 B. 20 C. 25 D. 35
- 用某种排序方法对线性表(25, 84, 21, 47, 15, 27, 68, 35, 20)进行排列时,元素序列的变化情况如下: (1) 25, 84, 21, 47, 15, 27, 68, 35, 20 (2) 20, 15, 21,25, 47, 27, 68, 35, 84 (3) 15, 20, 21, 25, 35, 27, 47, 68,84 (4) 15, 20, 21, 25, 27, 35, 47, 68, 84 则所有的排序方法是( )。
- 已知一组数据5、15、75、45、25、75、45、35、45、35,那么40是这一组数据的( )
- P99 3.(1)(3)(5)(7)(9)(11)(13)(15)(17)(19)(21)(23)(25)(27)(29)(31)(33)(35)
- 溴化锂循环冷却水入口温度控制在( )范围内。 A: 15℃-20℃ B: 20℃-25℃ C: 25℃-35℃ D: 35℃-45℃.