前两问我和答案做的是一样的,第三问求F(u)我是这样做的F(u)=P{U<=u}=P{YZ<=u}=P{YZ<=u|Y=0}P{Y=0}+P{YZ<=u|Y=1}P{Y=1}=P{0<=u|Y=0}P{Y=0}+P{Z<=u|Y=1}P{Y=1}=P{0<=u}P{Y=0}+P{Z<=u}P{Y=1}然后就是当 u<0时,F(u
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 23:37:20
![前两问我和答案做的是一样的,第三问求F(u)我是这样做的F(u)=P{U<=u}=P{YZ<=u}=P{YZ<=u|Y=0}P{Y=0}+P{YZ<=u|Y=1}P{Y=1}=P{0<=u|Y=0}P{Y=0}+P{Z<=u|Y=1}P{Y=1}=P{0<=u}P{Y=0}+P{Z<=u}P{Y=1}然后就是当 u<0时,F(u](/uploads/image/z/5470748-44-8.jpg?t=%E5%89%8D%E4%B8%A4%E9%97%AE%E6%88%91%E5%92%8C%E7%AD%94%E6%A1%88%E5%81%9A%E7%9A%84%E6%98%AF%E4%B8%80%E6%A0%B7%E7%9A%84%2C%E7%AC%AC%E4%B8%89%E9%97%AE%E6%B1%82F%28u%29%E6%88%91%E6%98%AF%E8%BF%99%E6%A0%B7%E5%81%9A%E7%9A%84F%28u%29%3DP%7BU%26lt%3B%3Du%7D%3DP%7BYZ%26lt%3B%3Du%7D%3DP%7BYZ%26lt%3B%3Du%7CY%3D0%7DP%7BY%3D0%7D%2BP%7BYZ%26lt%3B%3Du%7CY%3D1%7DP%7BY%3D1%7D%3DP%7B0%26lt%3B%3Du%7CY%3D0%7DP%7BY%3D0%7D%2BP%7BZ%26lt%3B%3Du%7CY%3D1%7DP%7BY%3D1%7D%3DP%7B0%26lt%3B%3Du%7DP%7BY%3D0%7D%2BP%7BZ%26lt%3B%3Du%7DP%7BY%3D1%7D%E7%84%B6%E5%90%8E%E5%B0%B1%E6%98%AF%E5%BD%93+u%26lt%3B0%E6%97%B6%2CF%28u)
xT]OA+
;3%*vc|cFxBZ-NE>̝{=sfdY"}j*CE>lnFoaiS͝=5$\~ozogۏ`Z#g'#.VK5N