设(X，Y)的分布函数为[img=549x53]1802f2b44889124.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）．
A: [img=287x55]1802f2b452b41b8.png[/img]
B: [img=285x52]1802f2b45d8ba79.png[/img]
C: [img=296x55]1802f2b4685296c.png[/img]
D: [img=294x56]1802f2b473202b3.png[/img]
A: [img=287x55]1802f2b452b41b8.png[/img]
B: [img=285x52]1802f2b45d8ba79.png[/img]
C: [img=296x55]1802f2b4685296c.png[/img]
D: [img=294x56]1802f2b473202b3.png[/img]
举一反三
- 设(X，Y)的分布函数为[img=549x53]18031e937a7b053.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）． A: [img=287x55]18031e93855481e.png[/img] B: [img=285x52]18031e93918b0ca.png[/img] C: [img=296x55]18031e939bc0749.png[/img] D: [img=294x56]18031e93a5c4883.png[/img]
- 设(X，Y)的分布函数为[img=549x53]1803a74a8f6ca05.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）． A: [img=287x55]1803a74a9a08d05.png[/img] B: [img=285x52]1803a74aa4ac3b9.png[/img] C: [img=296x55]1803a74aae81937.png[/img] D: [img=294x56]1803a74ab8d5dc7.png[/img]
- 设(X，Y)的分布函数为[img=549x53]1802f2b06f71f92.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）． A: [img=287x55]1802f2b07b2935e.png[/img] B: [img=285x52]1802f2b085d42f7.png[/img] C: [img=296x55]1802f2b0909ff33.png[/img] D: [img=294x56]1802f2b09a4b182.png[/img]
- 设(X，Y)的分布函数为[img=549x53]1802fe33b2edbf8.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）． A: [img=287x55]1802fe33bce09db.png[/img] B: [img=285x52]1802fe33c70b81c.png[/img] C: [img=296x55]1802fe33d153382.png[/img] D: [img=294x56]1802fe33dce67cb.png[/img]
- 设(X，Y)的分布函数为[img=549x53]1802fe238488376.png[/img]则(X，Y)关于X的边缘分布函数FX(x) = （ ）． A: [img=287x55]1802fe238e4be25.png[/img] B: [img=285x52]1802fe2399ec83d.png[/img] C: [img=296x55]1802fe23a524444.png[/img] D: [img=294x56]1802fe23aff94c4.png[/img]