1 . 在某项测量中,测量结果
服从正态分布
,若
在
内取值的概率为0.8,则
在
内取值的概率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2f0cc811c9261a90faaf6d267b5479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
A.0.9 | B.0.1 | C.0.5 | D.0.4 |
您最近一年使用:0次
2020-06-03更新
|
845次组卷
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5卷引用:江西省宜春市丰城中学2021届高三上学期期中考试理科数学试题
名校
2 . 设随机变量
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a718711dbafa4f35c5a32ab62bbd83a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865bfbef2326fb938b8949664a4970c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bbd3cb7d1447d91fdbc94de975ae7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a718711dbafa4f35c5a32ab62bbd83a1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-07-17更新
|
731次组卷
|
5卷引用:江西省南昌市新建县第一中学2019-2020学年高二下学期线上期中考试数学(理)试题