Let [img=47x25]1803a319caed5c0.png[/img] be the uniformly distributed within the unit circle, and the the joint probability density function be [img=501x61]1803a319d67d32e.png[/img]Then the marginal distribution of X in [img=47x25]1803a319caed5c0.png[/img] is also the uniform distribution.

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2022-06-07

Let [img=47x25]1803a319caed5c0.png[/img] be the uniformly distributed within the unit circle, and the the joint probability density function be [img=501x61]1803a319d67d32e.png[/img]Then the marginal distribution of X in [img=47x25]1803a319caed5c0.png[/img] is also the uniform distribution.

答案：

错

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内容

0
设f(x)在|x|>;a上有定义，若___________，使得当|x|>;X时，恒有|f(x)-A|<;ε, 称[img=57x14]17de8197cad5b33.png[/img]时函数f(x)有极限A，记作[img=33x32]17de8197d6e5e38.png[/img][img=71x25]17de8197e309ab5.png[/img]。 A: 存在ε>;0, 存在X>;0 B: 任意ε>;0, 存在X>;0 C: 存在ε>;0, 任意X>;0 D: 任意ε>;0, 任意X>;0
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设(X，Y)的分布函数为[img=549x53]1803c076f21158b.png[/img]则(X，Y)关于X的边缘分布函数[img=47x25]1803c076fa1f414.png[/img]= （）． A: [img=287x55]1803c077040f377.png[/img] B: [img=285x52]1803c0770f6f877.png[/img] C: [img=296x55]1803c0771aa22b5.png[/img] D: [img=294x56]1803c0772537d3d.png[/img]
2
设(X，Y)的分布函数为[img=549x53]180396e9ecea185.png[/img]则(X，Y)关于X的边缘分布函数[img=47x25]180396e9f5d63e6.png[/img]= （）． A: [img=287x55]180396ea00eecd8.png[/img] B: [img=285x52]180396ea0c63da7.png[/img] C: [img=296x55]180396ea1781257.png[/img] D: [img=294x56]180396ea23b96ce.png[/img]
3
已知[img=220x43]1802fca0bce8129.png[/img]，则为（）。 A: x(0)=0 B: x(0)=1 C: x(∞)=2 D: x(∞)=∞
4
已知[img=220x43]1803d439f00b6ff.png[/img]，则为（）。 A: x(0)=0 B: x(0)=1 C: x(∞)=2 D: x(∞)=∞