解题方法
1 . 如图,在正方形ABCD中的阴影部分的上下边界分别是曲线C1和C2,其中C1是正态分布N(0,0.52)的密度曲线,C1与C2关于
轴对称,若在正方形中随机取一点,则该点取自阴影部分的概率是( )
![](https://img.xkw.com/dksih/QBM/2020/10/2/2562425599123456/2563293675896832/STEM/efc5fb87cecb4d4f97b5dffad71c485d.png?resizew=195)
参考数据:随机变量Z服从正态分布N(
)的概率为:
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcc3c76f8759cf8373672dcab63c981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2020/10/2/2562425599123456/2563293675896832/STEM/efc5fb87cecb4d4f97b5dffad71c485d.png?resizew=195)
参考数据:随机变量Z服从正态分布N(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b299c8119eb4b14c5f38c46e38269f55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da51de1e39c2dadd9e8f5e51f36da5bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cb3f82d75b2db44b6083cb46917be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcc3c76f8759cf8373672dcab63c981.png)
A.0.6826 | B.0.9544 |
C.0.4772 | D.0.4987 |
您最近一年使用:0次