Forgot password?
 Register account
View 1248|Reply 2

[概率/统计] 概率统计一小题

[Copy link]

17

Threads

24

Posts

208

Credits

Credits
208

Show all posts

opuikl_0 Posted 2016-3-16 09:11 |Read mode
已知 $Y$ ~ $F_{1,5}$,Y服从F分布, $T=Z/\sqrt{U/5}$ 服从(学生)t分布, 也就是 T~$t_5$, $Y=T^2$。

求:
(a) 用t分布的表格找 P(Y>4);
(b)P(Y>c)=0.01, 求c.

24

Threads

1010

Posts

110K

Credits

Credits
12655

Show all posts

战巡 Posted 2016-3-16 09:33
回复 1# opuikl_0


如此基础的题还要问啊?

$P(Y>4)=P(T<-2)+P(T>2)=2P(T>2)$,剩下你自己看着办吧,不要告诉我查表不会

(b)以此类推

17

Threads

24

Posts

208

Credits

Credits
208

Show all posts

 Author| opuikl_0 Posted 2016-3-16 21:13
回复 2# 战巡


谢谢

Mobile version|Discuz Math Forum

2025-6-5 07:21 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit