名校
解题方法
1 . 某地区数学考试的成绩
服从正态分布
,正态分布密度函数为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29528c306f62a07075df86e03328e9fe.png)
,其密度曲线如图所示,则成绩
位于区间
的概率是__________ .(结果保留3为有效数字)本题用到参考数据如下:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0088531480beef86ec5a94a67edf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29528c306f62a07075df86e03328e9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad65ff0ab0a64844ab78062df2e6ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad544919a435b98c858357e172144498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b501d88313b2560071d5fbe48f2ace17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bce995dfca5907053853d80888916d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/1a6cb915-0a15-4e8b-909e-6d9792e2b205.png?resizew=336)
您最近一年使用:0次
2017-05-23更新
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761次组卷
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2卷引用:河南省灵宝市第五高级中学2021-2022学年高二下学期第一次月考数学理科试题