设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1802f2b2d860f7f.png[/img],[img=39x25]1802f2b2e0c7729.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1802f2b2e8413e8.png[/img]为( ).
A: f X(x)
B: f Y(y)
C: [img=49x49]1802f2b2f0bb048.png[/img]
D: [img=49x49]1802f2b2f8f8703.png[/img]
A: f X(x)
B: f Y(y)
C: [img=49x49]1802f2b2f0bb048.png[/img]
D: [img=49x49]1802f2b2f8f8703.png[/img]
举一反三
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1803395a2674391.png[/img],[img=39x25]1803395a2e884db.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1803395a3774627.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]1803395a4011789.png[/img] D: [img=49x49]1803395a48d6475.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]180380ab56c2763.png[/img],[img=39x25]180380ab5f656f8.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]180380ab67c0587.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]180380ab712dddf.png[/img] D: [img=49x49]180380ab79d6df8.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1802f2af7ef6df7.png[/img],[img=39x25]1802f2af8888765.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1802f2af916992b.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]1802f2af9a4f19e.png[/img] D: [img=49x49]1802f2afa35486e.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]180390ae1a3872d.png[/img],[img=39x25]180390ae22fe081.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]180390ae2bc9628.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]180390ae348dc17.png[/img] D: [img=49x49]180390ae3c4df1e.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]180387da66563e3.png[/img],[img=39x25]180387da6f51dbe.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]180387da783fc56.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]180387da80da6ab.png[/img] D: [img=49x49]180387da89b6db1.png[/img]