名校
解题方法
1 . 据研究,人的智力高低可以用智商
来衡量,且
,若定义
称为智商低下,
称为智商中下,
称为智商正常,
称为智商优秀,
称为智商超常,则一般人群中智商优秀所占的比例约为( )
(参考数据:若
,则
,
,
.)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/30adf184-b2f3-42cc-b782-a6720b3dc4ed.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94884e9faf6fdc5596836f1c382d4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5341bfc867f1d3082ad44ff3d1db93ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27af320555828b1840e8fa3768377258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d43a0b54fbd23910bc4f582e2a3b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abec960142473fd88b819ab0244797c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566fc77b18c5932402c7178e3807b354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b19c4f90bba77b94cd175972089bef.png)
(参考数据:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1290917c2c835b61384480b335cc1d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8f8641d4e8bbabc1e726417ac3c8cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee1c9871a68a9f90d1a27d3559aa974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9546031173beb4c429883aae0e16e03b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/30adf184-b2f3-42cc-b782-a6720b3dc4ed.png?resizew=169)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-06更新
|
1152次组卷
|
4卷引用:四川省四川大学附属中学2023届高三高考热身考试一理科数学试题
四川省四川大学附属中学2023届高三高考热身考试一理科数学试题贵州省贵阳市2023届高三适应性考试(二)数学(理)试题贵州省铜仁市2023届高三适应性考试(二)数学(理)试题(已下线)3.3 正态分布(同步练习)-【素养提升—课时练】2022-2023学年高二数学湘教版选择性必修第二册检测 (基础篇)
解题方法
2 . 若随机变量
服从正态分布
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce6848234873c13bb9bd0f05f38870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194d10285633883ed5220c8a1cb0827f.png)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
2016-12-04更新
|
698次组卷
|
2卷引用:2017届四川成都七中高三10月段测数学(理)试卷