å·²ç¥ä¸¤ä¸ªåéX,Yçèå
æ¦çå¯åº¦å½æ°ä¸ºf(x,y),æ±å½Xâ¤Yæ¶ï¼åéXç
æ¦çåå¸ï¼
解ï¼
F(x|Xâ¤y)=P(Xâ¤x|Xâ¤y)= P(Xâ¤x,Xâ¤y)/P(Xâ¤y)
= P(Xâ¤min(x,y))/P(Xâ¤y)
= F(min(x,y))/F(y)
æ¤å¤åååæ¯çFé½æ¯Xç
åå¸å½æ°ãä¾åèã