来自齐怀琴的问题
设二维随机变量(X,Y)概率密度为f(x,y)=3x,{0
设二维随机变量(X,Y)概率密度为f(x,y)=3x,{0
3回答
2020-12-21 09:26
设二维随机变量(X,Y)概率密度为f(x,y)=3x,{0
设二维随机变量(X,Y)概率密度为f(x,y)=3x,{0
把x=1/4代入f(x,y)=3x,{0
错
f(y)=3/2*(1-y^2),0