已知随机变量X服从两点分布,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976bb67cb2d5ed4bb05ee689e9b083e3.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac87b4bd71432d757c7b78bbd6b2dcfd.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c6d613fe6c8b47c6d64ab424b7cc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976bb67cb2d5ed4bb05ee689e9b083e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac87b4bd71432d757c7b78bbd6b2dcfd.png)
22-23高二下·山西朔州·阶段练习 查看更多[4]
山西省朔州市怀仁市第一中学校等校2022-2023学年高二下学期第三次月考数学试题(已下线)第04讲 7.3.1离散型随机变量的均值-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第三册)(已下线)7.3.1 离散型随机变量的均值——课后作业(巩固版)(已下线)7.3.1 离散型随机变量的均值——课后作业(提升版)
更新时间:2023-08-08 10:42:01
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【推荐1】已知随机变量X服从两点分布,且
,
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a11d92de3eb6ffd919e659311c5fa27.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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【推荐2】在掷一枚图钉的随机试验中,令
,若随机变量
的分布为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbae4dcf2707f47fcd52377c4f26af0.png)
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