解一道大学概率题(联合分布)
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解一道大学概率题(联合分布)
关于X和Y的联合分布(joint distribution)概率函数f(x,y)=[e(-y)]/y 且0
确认为f(x,y)=[e(-y)]/y
关于X和Y的联合分布(joint distribution)概率函数f(x,y)=[e(-y)]/y 且0
确认为f(x,y)=[e(-y)]/y
![解一道大学概率题(联合分布)](/uploads/image/z/15492974-14-4.jpg?t=%E8%A7%A3%E4%B8%80%E9%81%93%E5%A4%A7%E5%AD%A6%E6%A6%82%E7%8E%87%E9%A2%98%28%E8%81%94%E5%90%88%E5%88%86%E5%B8%83%29)
f(x,y)=[e(-y)]/y--------There is no x in the joint density function.
It can't be uniform distribution for X because the definition region of X is infinity. Please double check.
It can't be uniform distribution for X because the definition region of X is infinity. Please double check.