#1
|
||||
|
||||
Probability
ÁÕ⨷Âì¨Ò¡ Text ¢é͹֧ §§ ¤ÃѺ ·ÓáÅéÇ àËÁ×͹ Variance µÔ´ ź = = äÁèÃÙé·ÓäüԴ
Let X have the cumulative density function F(x),find moment generating function,mean,variance of random variable X $ F(x) = \cases{0 & , x \leqslant -1 \cr \frac{x^2}{4} & ,-1 < x< 1 \cr 1 & , x \geqslant 1 }$
__________________
àÃ×èÍÂæ à©×èÍÂæ |
#2
|
|||
|
|||
ÍéÒ§ÍÔ§:
$f(x)= \cases{\frac{x}{2} & , -1<x <1 \cr 0 & , \text{otherwise}} $
__________________
site:mathcenter.net ¤Ó¤é¹ |
#3
|
||||
|
||||
¤ÃѺ áµè àÍèÍ -*- Probability Density function ¢Í§¢é͹Õé ¶éÒÅͧ Integrate Over All x º¹ -1 ¶Ö§ 1 ÁѹäÁèä´é 1 ¹Ô¤ÃѺ áÅéÇ¡ç¨Ò¡ F(x) àËÁ×͹ÁѹäÁèµèÍà¹×èͧ ³ ¨Ø´ x=1 ¡Ñº -1 pdf ¢Í§Áѹàŵéͧ¹ÔÂÒÁẺ Discrete ¼ÊÁ Continuous »èФÃѺ ¼ÁÅͧ¹ÔÂÒÁä´éẺ¹ÕéÍèÒ
$f(x) = y = \cases{x/2 & , -1<x<1 \cr 1 & , x =1 \cr 0 & , elsewhere} $ áµè¾ÍËÒ Variance ÁÒ»Øêº µÔ´Åº §§ = = ...
__________________
àÃ×èÍÂæ à©×èÍÂæ 17 Á¡ÃÒ¤Á 2012 12:32 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ nongtum à˵ؼÅ: double post+á¡éàÅ硹éÍÂâ»Ã´ãªé»ØèÁá¡éä¢ |
#4
|
|||
|
|||
¨ÃÔ§´éǤÃѺ ¼ÁÅ×ÁÁͧ¶Ö§µÃ§¹Õéä»àÅÂ
ÊÃØ»ÇèÒ⨷Âì¼Ô´¤ÃѺ à¾ÃÒÐ cdf ¨Ðµéͧà»ç¹ nondecreasing function áµè·Õè⨷ÂìãËéÁÒäÁèãªè¤ÃѺ
__________________
site:mathcenter.net ¤Ó¤é¹ |
#5
|
||||
|
||||
ÍéͤÃѺ ¢Íº¤Ø³¤ÃÒº
__________________
àÃ×èÍÂæ à©×èÍÂæ |
ËÑÇ¢éͤÅéÒ¤ÅÖ§¡Ñ¹ | ||||
ËÑÇ¢éÍ | ¼ÙéµÑé§ËÑÇ¢éÍ | Ëéͧ | ¤ÓµÍº | ¢éͤÇÒÁÅèÒÊØ´ |
Probability | Amankris | »ÑËÒ¤³ÔµÈÒʵÃì·ÑèÇä» | 18 | 20 ¡ØÁÀҾѹ¸ì 2011 03:05 |
à¡ÕèÂǡѺ probability distribution ¹Ð¤ÃѺ | phoenixs | ¤³ÔµÈÒʵÃìÍØ´ÁÈÖ¡ÉÒ | 2 | 09 ¡ØÁÀҾѹ¸ì 2010 22:09 |
probability | t.B. | »ÑËÒ¤³ÔµÈÒʵÃì Á.»ÅÒ | 7 | 25 ¡ØÁÀҾѹ¸ì 2008 06:47 |
probability questions?? | suan123 | ¤³ÔµÈÒʵÃìÍØ´ÁÈÖ¡ÉÒ | 5 | 26 àÁÉÒ¹ 2007 09:56 |
Probability | Redhotchillipepper | »ÑËÒ¤³ÔµÈÒʵÃì Á.»ÅÒ | 3 | 30 Á¡ÃÒ¤Á 2007 15:53 |
|
|