设[img=9x23]18039e6fe05b74f.png[/img]连续，则[img=232x51]18039e6fea63327.png[/img]
A: [img=217x51]18039e6ff4fd82c.png[/img]
B: [img=217x51]18039e6ffe9416d.png[/img]
C: [img=217x53]18039e700873580.png[/img]
D: [img=216x53]18039e701407e9f.png[/img]
A: [img=217x51]18039e6ff4fd82c.png[/img]
B: [img=217x51]18039e6ffe9416d.png[/img]
C: [img=217x53]18039e700873580.png[/img]
D: [img=216x53]18039e701407e9f.png[/img]
举一反三
- 设[img=9x23]1802f86d71861ca.png[/img]连续，则[img=232x51]1802f86d7c0446e.png[/img] A: [img=217x51]1802f86d86e14d2.png[/img] B: [img=217x51]1802f86d90e64cf.png[/img] C: [img=217x53]1802f86d9baca90.png[/img] D: [img=216x53]1802f86da680769.png[/img]
- 设[img=9x23]1803894f5d6503a.png[/img]连续，则[img=232x51]1803894f6980685.png[/img] A: [img=217x51]1803894f755e336.png[/img] B: [img=217x51]1803894f811860b.png[/img] C: [img=217x53]1803894f8e8be1e.png[/img] D: [img=216x53]1803894f9a869a5.png[/img]
- 设随机变量X的分布律为P(X=i)=i/6，i=1,2,3,记Y=max(X,2)，则Y的分布函数F(x)=（ ）. A: [img=134x97]18032ce5f620d8f.png[/img] B: [img=134x97]18032ce5ffc4209.png[/img] C: [img=134x97]18032ce60b3653b.png[/img] D: [img=134x97]18032ce61742a1c.png[/img] E: [img=106x51]18032ce62052d87.png[/img]
- 设f(x)为连续型随机变量X的密度函数，则对任意的a<b，E(X)=（ ）. A: [img=92x39]1802e2aa01c2150.jpg[/img] B: [img=81x40]1802e2aa0b123c6.jpg[/img] C: [img=70x40]1802e2aa139d6a9.jpg[/img] D: [img=99x48]1802e2aa1bc0ab9.png[/img]
- 设投掷1颗骰子的点数为X,则( ) 未知类型：{'options': ['E(X)=3.5,D(X)= [img=29x21]17e43c3db9dc21b.png[/img]', ' E(X)=3.5, D(X)= [img=22x41]17e43c3dc2146ee.png[/img]', ' E(X)=3.5,D(X)=3.5', ' E(X)=3.5,D(X)=[img=22x41]17e43c3dcacf7d1.png[/img]'], 'type': 102}