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设随机变量X服从参数为λ=1的指数分布,即X~E(1),现在对X进行3次独立观察.1,求X的观测值大
设随机变量X服从参数为λ=1的指数分布,即X~E(1),现在对X进行3次独立观察.1,求X的观测值大
发布时间:2021-02-28 05:21:55
设随机变量X服从参数为λ=1的指数分布,即X~E(1),现在对X进行3次独立观察.1,求X的观测值大于1的概率 2,至少有2次观测值大于1的概率
网友回答
1、大于1的概率就是p(x>1),用密度函数在1到正无穷积分就行了,其实也就是1-F(1)
2、其实就是做伯努利实验,服从二项分布,参数为(n,p),p就是前面1求出来的值.至少有两次,把两次的和三次的概率相加即可.
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