| ²é¿´: 366 | »Ø¸´: 1 | |||
| µ±Ç°Ö÷ÌâÒѾ´æµµ¡£ | |||
wuhanhgf2002½ð³æ (ÕýʽдÊÖ)
|
[½»Á÷]
¡¾ÇóÖú¡¿¹ØÓÚ±ê׼ƫ²îºÍ±ê×¼Îó²î
|
||
|
ÇëÎʱê׼ƫ²î£¨standard deviation£©ºÍ±ê×¼Îó²î(standard error)ÓÐʲôÒìͬ£¬Äܲ»Äܾ¡Á¿½âÊ͵ÄͨË×һЩ£¬»òÕß¾Ù¸öÀý×Ó£¬Ð»Ð»¡£ÔÙ¾ÍÊÇÓÃʲô¹«Ê½¿ÉÒ԰ѱê׼ƫ²îת»¯³É±ê×¼Îó²î£¿¼´stdºÍseÖ®¼äµÄת»»¹«Ê½¡£ [ Last edited by zdhlover on 2009-11-23 at 13:54 ] |
» ²ÂÄãϲ»¶
Çóµ÷¼Á
ÒѾÓÐ23È˻ظ´
301Çóµ÷¼Á
ÒѾÓÐ15È˻ظ´
304Çóµ÷¼Á£¨085602£¬¹ýËļ¶£¬Ò»Ö¾Ô¸985£©
ÒѾÓÐ17È˻ظ´
302·ÖÇóµ÷¼Á Ò»Ö¾Ô¸°²»Õ´óѧ085601
ÒѾÓÐ12È˻ظ´
288»·¾³×¨Ë¶,Çóµ÷²ÄÁÏ·½Ïò
ÒѾÓÐ23È˻ظ´
»·¾³×¨Ë¶µ÷¼Á
ÒѾÓÐ6È˻ظ´
22408 µ÷¼Á²ÄÁÏ
ÒѾÓÐ6È˻ظ´
285Çóµ÷¼Á
ÒѾÓÐ12È˻ظ´
Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
085600²ÄÁÏÓ뻯¹¤301·ÖÇóµ÷¼ÁԺУ
ÒѾÓÐ19È˻ظ´
snoopyzhao
ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)
- Ó¦Öú: 157 (¸ßÖÐÉú)
- ¹ó±ö: 0.02
- ½ð±Ò: 18844.7
- ºì»¨: 29
- Ìû×Ó: 3803
- ÔÚÏß: 1422.4Сʱ
- ³æºÅ: 183750
- ×¢²á: 2006-02-13
- רҵ: ÎÛȾÉú̬»¯Ñ§
¡ï ¡ï ¡ï
mingdong(½ð±Ò+3,VIP+0):лл 3-26 16:46
mingdong(½ð±Ò+3,VIP+0):лл 3-26 16:46
|
±ê׼ƫ²îÒ»°ãÕë¶Ô¸¸·Ö²¼¶øÑÔ£¬¼ÆË㹫ʽ£º s = sqrt(sum(x_i - x_mean)^2 / (n -1)) ÕâÀïµÄ n ÊÇÖ¸Ñù±¾ÈÝÁ¿ ±ê×¼Îó²îͨ³£ÊÇÕë¶Ô³éÑù·Ö²¼ÖеÄÑù±¾µÄƽ¾ùÖµ¶øÑԵġ£ se = s / sqrt(n) ÕÒ±¾¸ÅÂÊͳ¼ÆµÄÊ鿴һϰɣ¬¿ÉÒÔÖØµã¹Ø×¢ÖÐÐļ«ÏÞ¶¨Àí²¿·Ö¡£ ×¢Ò⣬ÕâÁ½¸ö¹«Ê½Ö®¼äûÓбØÈ»µÄÁªÏµ¡£ |
2Â¥2009-03-26 15:13:36














»Ø¸´´ËÂ¥