已知随机变量
服从正态分布
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117da6344a17d335fd98d73731416d29.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bcc248a7770a16fa10fc4602d71e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23de32dfb511b9932a84b93a82ea1dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117da6344a17d335fd98d73731416d29.png)
更新时间:2023-06-18 16:52:19
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相似题推荐
填空题-双空题
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(0.85)
解题方法
【推荐1】(1)设随机变量
服从正态分布
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef36260f55066bd9d3f3e428c279e1c.png)
______________ ;
(2)已知随机变量
服从正态分布
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482ec3a2e17b0f8812276007c3522667.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3325d357e4e3a160e6cc357cac2c1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a390c5bdc5a1a18f998ba36957bc79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef36260f55066bd9d3f3e428c279e1c.png)
(2)已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c67a470ef7c8c9d3afc99c82af18c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca264946ed0f598b4cd8a4f3c71e8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482ec3a2e17b0f8812276007c3522667.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
名校
解题方法
【推荐2】已知随机变量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614cc520a6d6e8998d98db8eeebfa100.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4e8e0054c9dc9e3f4545be97d2ba2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f52b9cf1fd177da9cc1f7a755c5b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614cc520a6d6e8998d98db8eeebfa100.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
名校
【推荐3】某校高二学生的一次数学诊断考试成绩(单位:分)服从正态分布
,从中抽取一个同学的数学成绩
,记该同学的成绩
为事件
,记该同学的成绩
为事件
,则在
事件发生的条件下
事件发生的概率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f16885a3437e6d301de8508f1b15b5.png)
_________ .(结果用分数表示)
附参考数据:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db456f2971b7c808341b749a1f210b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334390238b05d815278af0686e6dbe7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66bac21ea447d3b4f28cc3e7cd54d4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f16885a3437e6d301de8508f1b15b5.png)
附参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37051bb6ee258254ed0a21e8c8a40d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b682c9d385f2a9fc29faeb468fabc643.png)
您最近一年使用:0次