某种产品的质量指标值
服从正态分布
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d47c6a58bc065ee7010e5421f936eec.png)
.某用户购买了
件这种产品,则这
件产品中质量指标值位于区间
之外的产品件数为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84c2c26cbb6b22a415fd0830401aeac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d47c6a58bc065ee7010e5421f936eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bf2dfefc409c6138bdda1acb93c32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1926eb08a21a8b6558fcfd4c52a4a23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1926eb08a21a8b6558fcfd4c52a4a23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cefd8e989740095c0c6e9b5a42e443.png)
更新时间:2020-03-29 21:02:34
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相似题推荐
填空题-单空题
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容易
(0.94)
解题方法
【推荐1】抽样表明,某地区新生儿体重
近似服从正态分布
.假设随机抽取
个新生儿体检,记
表示抽取的
个新生儿体重在
以外的个数.若
的数学期望
,则
的最大值是___________ .(
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bcc248a7770a16fa10fc4602d71e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6160e680fa4d92a11568ef45bea128fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a785140e1dbc585e704d9a281b9341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a70c096b5378631f6774149d0d901dc.png)
您最近一年使用:0次
填空题-概念填空
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容易
(0.94)
【推荐2】
原则
正态分布在三个特殊区间内取值的概率:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98246e6201e9112a0a3d041a334d1c22.png)
_________ ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8c830266e545902db43bcb35f61205.png)
_________ ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e58d71900e4637dfbf5d0e6cac7e2f.png)
__________ .
通常认为服从于正态分布
的随机变量X只取_________ 中的值,并简称之为
原则.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45d81fb351bc6c693fb0a114152b2d0.png)
正态分布在三个特殊区间内取值的概率:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98246e6201e9112a0a3d041a334d1c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8c830266e545902db43bcb35f61205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e58d71900e4637dfbf5d0e6cac7e2f.png)
通常认为服从于正态分布
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bcc248a7770a16fa10fc4602d71e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45d81fb351bc6c693fb0a114152b2d0.png)
您最近一年使用:0次