跪求此数理统计题的解答过程,万分感谢
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发布时间:2023-09-02 13:57
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热心网友
时间:2024-01-21 00:56
(1)P(X<=1,Y<=1)=∫[0,1]dx∫[0,1]1/8(x+Y)dy
=∫[0,1](1/8*x+/16)dx
=1/8
(2)P(X+Y<=3)==1-P(X+Y>3)
=1-∫[1,2]dx∫[3-x,2]1/8(x+Y)dy
=1-∫[1,2][1/8(2x+2)-1/8x(3-x)-1/16(3-x)^2]dx
=1/2
热心网友
时间:2024-01-21 00:56
(1)P(X<=1,Y<=1)=∫[0,1]dx∫[0,1]1/8(x+Y)dy
=∫[0,1](1/8*x+/16)dx
=1/8
(2)P(X+Y<=3)==1-P(X+Y>3)
=1-∫[1,2]dx∫[3-x,2]1/8(x+Y)dy
=1-∫[1,2][1/8(2x+2)-1/8x(3-x)-1/16(3-x)^2]dx
=1/2