Çó½â´ðͳ¼ÆѧÎÊÌ⣡Õâ¸öÌâÄ¿µÄ´ð°¸ÊÇʲô£¿
ͳ¼ÆѧµÄÎÊÌâ,Çó½â´ð
µÚÒ»Ì⣺£¨a£©ÄãÐèÒª¶Ô¿Í»§ÂúÒâ¶È×öÒ»¸ö¼ÓȨƽ¾ù£¬µÃµ½µÄƽ¾ùÖµÓëËùÓпͻ§µÄƽ¾ùÂúÒâ¶ÈÄ¿±êˮƽ7.0±È½Ï£¬¾Í¿ÉÒԵõ½Æ½¾ù¿Í»§ÂúÒâ¶ÈÊÇ·ñµÍÓÚÄ¿±êÖµ¡££¨b£©Èç¹ûÄãµ÷²éÁË200...
ͳ¼ÆѧÌâÄ¿ Çó½â´ð
½â£ºÒÑÖªX~N£¨16.4£¬2.75²£©P£¨X£¼20£©=P{(X-16.4)/2.75<(20-16.4)/2.75}=¦µ£¨1.31£©²éÕý̬·Ö²¼±í¿ÉÖª ¦µ£¨1.31...
ÇóÓãÌÁÖÐÓãµÄÌõÊý,ÀÌÆð100Ìõ×öÉϼǺźó·Å»Ø,Ò»¶Îʱ¼ä...
ÓÐÕâÑùÒ»µÀ¹ØÓÚͳ¼ÆµÄ³õÖÐÊýѧÌ⣺ÀÏÍõÏë¹À¼ÆÒ»ÏÂ×Ô¼º³ØÌÁÀïÓãµÄÊýÁ¿£¬µÚÒ»ÌìËû²¶ÀÌÁË 50 ÌõÓã×öºÃ±ê¼Ç£¬È»ºóÖØзŻسØÌÁ¡£¹ýÁ˼¸Ìì´ø±ê¼ÇµÄ...
ÈçºÎÓÃÊýѧ֪ʶ½â´ð¡¸ÔÚ½øÐÐÉçÇø´ó¹æÄ£ºËËá¼ì²âʱ...
ΪÁ˽ÚÔ¼´ÎÊý£¬Ï£ÍûE(X)ԽСԽºÃ¡£ÕâÊÇÒ»¸ö¼òµ¥µÄÇó¼«ÖµÎÊÌâ¡£ÇóµÃk=11ʱ£¬E(X)È¡×îСֵ£¬Îª0.205£¬Ò²¾ÍÊÇ˵ƽ¾ù¸öÈËÖ»ÐèÒª¼ì²â0.205...
´óһͳ¼ÆѧµÄÌâÄ¿,ÇóÏêϸ½â´ð
³É½»Á¿=£¨12000/1.1)+(28000/1.4)+(15000/1.5)=4909½ï£¬Æ½¾ù¼Û¸ñ=55000/4909=1.344Ôª/½ï¡£
ͳ¼ÆѧÎÊÌâ,Çó½â´ðÁ¬ÐøÉú²úµÄµç×ӹܳ§,²úÆ·ÖÊÁ¿¼ìÑéÊÇ...
C ÒòΪÊÇÿ¸ôÒ»¸öСʱ³éÈ¡µÄ²úÆ· A ´ð°¸ ¼òµ¥Ëæ»ú³éÑùÊÇ ºÜËæ»úµÄ³éÈ¡ ûÓÐ˳Ðò ¹æÂÉ B ÀàÐͳéÑùÊÇÕÒ·ÖÀà±ðµÄ³éÈ¡
¸ß·ÖÇó´óѧͳ¼ÆѧϰÌâ½â´ð,ÎÊÌâÈçÏÂ
Èç6Ô³õ¿ÉÒÔÀí½âΪ5ÔÂÄ©£¬ÒԴ˼ÆËãÒ»¸öÔµÄƽ¾ùÉÌÆ·¿â´æ¶î£¬ËùÒÔÒ»ÔÂƽ¾ùÉÌÆ·¿â´æ¶î£º£¨68+60£©/2=64, 2ÔÂ57.5 3ÔÂ51.5 4ÔÂ45.5 5ÔÂ41.5 6ÔÂ45 ...
ͳ¼Æѧ¼òµ¥Ò»ÌâÇó½â´ð°¡
200*12%=24 Ò²¾ÍÊÇÓÐ200¸öÌǹû£¬ÆäÖÐÿ¸öÌǹûÊÇÀ¶ÌǹûµÄ¸ÅÂÊÊÇ0.15£¬Õâ200¿ÅÌǹûÖУ¬À¶Ìǹû³¬¹ý24¿ÅµÄ¸ÅÂÊÊÇ¡£23¿Å£¬22¿Å¡£¡£¡£1¿ÅµÄʱºòËã³öÀ´ËûµÄ¸ÅÂÊ¡£ÔÙ1¼õÈ¥...
ͳ¼ÆѧÌâÄ¿,Çó½â´ð
µÚ¶þÌâ²»¶®£¬²»ÖªµÀʲôÊÇ»ùÆÚʲôÊDZ¨¸æÆÚ¡£µÚÒ»Ìâ¾ÍÊǸöÕý̬·Ö²¼ X~N(¦Ì£¬¦Ò^2)¡£ÒÔÈ«ÊÐΪ¶ÔÏóµÄ»°£¬¦Ò£¨³ß¶È²ÎÊý£©ÎªÊÕÈë±ê×¼²îÒ²¾ÍÊÇ200£¬¦Ì£¨Î»ÖòÎÊý£©¾Í...
ÄÄλ °ï½â´ðÒ»ÏÂÕâ¸öͳ¼ÆѧÎÊÌâ,Çó¹ý³Ì
µÚÒ»¼¾¶Èƽ¾ùÈËÊý=£¨1ÔÂ+2ÔÂ+3Ô£©/3=404£»ÉÏ°ëÄêƽ¾ùÈËÊý=£¨1ÔÂ+2ÔÂ+3ÔÂ+4ÔÂ+5ÔÂ+6Ô£©/6=407