´óѧÊýÀíͳ¼ÆÌ⣿
ÊýÀíͳ¼ÆÌâÔõô×öѽ?
y/aµÄ·½²îÊÇ1/16£¬¶øyµÄ·½²îÊÇ1£¬ÓÚÊÇa=4£»ÔÙ¿´b£¬(y-b)/aµÄÆÚÍûÊÇ1¶øyµÄÆÚÍûÊÇ0£¬ÄÇôa+...
´óѧ¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆÌâÄ¿?
¡à¦ÁµÄ±ä»¯Ëæ¦Ä±ä»¯¶ø±ä»¯¡¢Óë¦ÌÎ޹ء£¦ÄÓë¦Á³Ê·´Ïò±ä»¯£¬¼´¦Ä±ä´ó¦Á±äС£¬¦Ä±äС¦Á±ä´ó¡£
¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆµÄÌâÄ¿
Á½¸öСÈý½ÇÐÎÃæ»ý£º1/2*22*22+1/2*23*23=506.5 ÔòÏàÓöµÄ¸ÅÂÊΪ£º£¨576-506.5£©/576=12.07%...
´óѧ¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆÌâÄ¿
½â£º¸ù¾Ý¶þάËæ»ú±äÁ¿ÁªºÏ·Ö²¼µÄ¶¨Ò壬ÓÐf(x,y)=1/SD£¬(x,y)¡ÊD¡¢f(x,y)=0£¬(x,y)8713;D£¬ÆäÖÐSDÊÇÇøÓòDµÄÃæ»ý¡£¶ø...
¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆÎÊÌâ?
Cov(X,Y) = E(XY) − E(X)E(Y) = b¦Ò ½áºÏ±¾Ì⣬ȡa=100£¬b=-1 ½âµÃ¦ÒXY=-1
¹ØÓÚ´óѧ¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆµÄÌâÄ¿,Çó½â´ð
=lim(x¡ú+¡Þ£¬y¡ú+¡Þ)F(x£¬y)=A ¡àA=1 (2)¹ØÓÚXµÄ±ßÔµ·Ö²¼º¯ÊýΪ FX(x)=lim(y¡ú+¡Þ)F...
¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆµÄÒ»µÀÌâÄ¿?
Ê×ÏÈ£¬ÎÒÃÇÐèÒª¼ÆËãÑù±¾¾ùÖµx̄µÄ·Ö²¼¡£ÓÉÓÚµ¥´Î²âÁ¿½á¹û·þ´ÓÕý̬·Ö²¼N(¦Ì£¬4)£¬µ±½øÐÐn´Î¶ÀÁ¢...
´óѧ¸ÅÂÊÂÛÊýÀíͳ¼Æ¾Ø¹À¼ÆºÍ¼«´óËÆÈ»¹À¼ÆÌâÄ¿?
¢Ù¾Ø¹À¼Æ¡£¡ßP(X=k)=[e^(-¦Ë)](¦Ë^k)/(k!)£¬k=0,1,2£¬¡¡£Ñù±¾¾ùÖµX'=(1/n)¡Æxi¡£...
´óѧ¸ÅÂÊÂÛÓëÊýÀíͳ¼ÆÌâÄ¿ лл¸÷λÁË!
A=3 2)fx(x)=¡Ò(0~x)(Ax) dy =Axy|(0~x)=3x^2 x 0~1 else=0 fy(y)=¡Ò(y~1)(Ax...
¸ÅÂÊÂÛÊýÀíͳ¼ÆµÄÏ°Ìâ
ÓÉÌ⣬ n=10£¬ ´úÈë¿ÉµÃ¡£×¢£º X- Ϊ XÉϼÓÒ»ºá¡£11²»Ì«È·¶¨£¬Äã¿ÉÒÔÔÙÎÊÎÊÀÏʦ¡£ == ...