The set[img=374x93]1803b6a7647e71f.png[/img]. Which of the following choices are bases for W? There are more than one right choices.
A: [img=133x85]1803b6a76f9197d.png[/img]
B: [img=133x85]1803b6a77a1eade.png[/img]
C: [img=133x85]1803b6a784b6462.png[/img]
D: [img=79x85]1803b6a78dbef86.png[/img]
E: [img=79x85]1803b6a795eeb03.png[/img]
F: [img=79x85]1803b6a7a3e6e54.png[/img]
A: [img=133x85]1803b6a76f9197d.png[/img]
B: [img=133x85]1803b6a77a1eade.png[/img]
C: [img=133x85]1803b6a784b6462.png[/img]
D: [img=79x85]1803b6a78dbef86.png[/img]
E: [img=79x85]1803b6a795eeb03.png[/img]
F: [img=79x85]1803b6a7a3e6e54.png[/img]
举一反三
- 已知随机变量X的概率密度为[img=129x66]17de92201995d30.png[/img]则E(X)=( ). A: 6 B: 3 C: 1 D: 0.5
- 已知随机变量X的概率密度为[img=174x59]17e0a945ec2931c.png[/img]，则E(X)= A: 0.5 B: 1 C: 3 D: 6
- 已知随机变量X的概率密度为[img=129x66]1803b45172559f9.png[/img]则E(X)=( ). A: 6 B: 3 C: 1 D: 0.5
- 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]
- 若X ~ N(3,[img=18x22]1803392546fb4bb.png[/img] ) ，且P{X[img=14x21]180339254fafce9.png[/img]6}=0.9 ，则P{X<0}= ．