ijũ¿ÆËù·Ö±ð¼Ç¼ÁË12ÔÂ1ÈÕÖÁ12ÔÂ5ÈÕµÄÿÌìÖçҹβîÓëʵÑéÊÒÿÌìÿ100¿ÅÖÖ×ÓÖеķ¢Ñ¿Êý£¬µÃµ½ÈçÏÂ×ÊÁÏ£º

¸ÃÅ©¿ÆËùÈ·¶¨µÄÑо¿·½°¸ÊÇ£ºÏÈ´ÓÕâÎå×éÊý¾ÝÖÐÑ¡³ö2×飬ÓÃʣϵÄ3×éÊý¾ÝÇóÏßÐԻع鷽³Ì£¬ÔÙ¶Ô±»Ñ¡³öµÄ2×éÊý¾Ý½øÐмìÑ飮

(1)ÈôÑ¡È¡µÄÊÇ12ÔÂ1ÈÕÓë12ÔÂ5ÈÕµÄÁ½×éÊý¾Ý£¬Çë¸ù¾Ý12ÔÂ2ÈÕÖÁ12ÔÂ4ÈÕµÄÊý¾Ý£¬Çó³öy¹ØÓÚxµÄÏßÐԻع鷽³Ì£»

(2)ÈôÓÉÏßÐԻع鷽³ÌµÃµ½µÄ¹À¼ÆÊý¾ÝÓëËùÑ¡³öµÄ¼ìÑéÊý¾ÝµÄÎó²î¾ù²»³¬¹ý2¿Å£¬ÔòÈÏΪµÃµ½µÄÏßÐԻع鷽³ÌÊÇ¿É¿¿µÄ£®ÊÔÎÊ(1)ÖÐËùµÃµÄÏßÐԻع鷽³ÌÊÇ·ñ¿É¿¿£¿

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

ijũ¿ÆËù¶Ô¶¬¼¾Öçҹβî´óСÓëij·´¼¾½Ú´ó¶¹ÐÂÆ·ÖÖ·¢Ñ¿¶àÉÙÖ®¼äµÄ¹Øϵ½øÐзÖÎöÑо¿£¬ËûÃÇ·Ö±ð¼Ç¼ÁË12ÔÂ1ÈÕÖÁ12ÔÂ5ÈÕµÄÿÌìÖçҹβîÓëʵÑéÊÒÿÌìÿ100¿ÅÖÖ×ÓÖеķ¢Ñ¿Êý£¬µÃµ½ÈçÏÂ×ÊÁÏ£º
ÈÕ    ÆÚ 12ÔÂ1ÈÕ 12ÔÂ2ÈÕ 12ÔÂ3ÈÕ 12ÔÂ4ÈÕ 12ÔÂ5ÈÕ
βîx£¨¡ãC£© 10 11 13 12 8
·¢Ñ¿Êýy£¨¿Å£© 23 25 30 26 16
¸ÃÅ©¿ÆËùÈ·¶¨µÄÑо¿·½°¸ÊÇ£ºÏÈ´ÓÕâÎå×éÊý¾ÝÖÐÑ¡È¡2×飬ÓÃʣϵÄ3×éÊý¾ÝÇóÏßÐԻع鷽³Ì£¬ÔÙ¶Ô±»Ñ¡È¡µÄ2×éÊý¾Ý½øÐмìÑ飮
£¨1£©ÇóÑ¡È¡µÄ2×éÊý¾ÝÇ¡ºÃÊDz»ÏàÁÚ2ÌìÊý¾ÝµÄ¸ÅÂÊ£»
£¨2£©ÈôÑ¡È¡µÄÊÇ12ÔÂ1ÈÕÓë12ÔÂ5ÈÕµÄÁ½×éÊý¾Ý£¬Çë¸ù¾Ý12ÔÂ2ÈÕÖÁ12ÔÂ4ÈÕµÄÊý¾Ý£¬Çó³öy¹ØÓÚxµÄÏßÐԻع鷽³Ì
y
=bx+a
£»
£¨3£©ÈôÓÉÏßÐԻع鷽³ÌµÃµ½µÄ¹À¼ÆÊý¾ÝÓëËùÑ¡³öµÄ¼ìÑéÊý¾ÝµÄÎó²î¾ù²»³¬¹ý2¿Å£¬ÔòÈÏΪµÃµ½µÄÏßÐԻع鷽³ÌÊÇ¿É¿¿µÄ£¬ÊÔÎÊ£¨2£©ÖÐËùµÃµÄÏßÐԻع鷽³ÌÊÇ·ñ¿É¿¿£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

ijũ¿ÆËù¶Ô¶¬¼¾Öçҹβî´óСÓëij·´¼¾½Ú´ó¶¹ÐÂÆ·ÖÖ·¢Ñ¿¶àÉÙÖ®¼äµÄ¹Øϵ½øÐзÖÎöÑо¿£¬ËûÃÇ·Ö±ð¼Ç¼ÁË12ÔÂ1ÈÕÖÁ12ÔÂ5ÈÕµÄÿÌìÖçҹβîÓëʵÑéÊÒÿÌìÿ100¿ÅÖÖ×ÓÖеķ¢Ñ¿Êý£¬µÃµ½ÈçÏÂ×ÊÁÏ£º
ÈÕÆÚ 12ÔÂ1ÈÕ 12ÔÂ2ÈÕ 12ÔÂ3ÈÕ 12ÔÂ4ÈÕ 12ÔÂ5ÈÕ
βx£© 10 11 13 12 8
·¢Ñ¿Êýy 23 25 30 26 16
¸ÃÅ©¿ÆËùÈ·¶¨µÄÑо¿·½°¸ÊÇ£ºÏÈ´ÓÕâÎå×éÊý¾ÝÖÐÑ¡È¡2×飬ÓÃʣϵÄ3×éÊý¾ÝÇóÏßÐԻع鷽³Ì£¬ÔÙ¶Ô±»Ñ¡È¡µÄ2×éÊý¾Ý½øÐмìÑ飮
£¨1£©ÇóÑ¡È¡µÄ2×éÊý¾ÝÇ¡ºÃÊDz»ÏàÁÚ2ÌìÊý¾ÝµÄ¸ÅÂÊ£»
£¨2£©ÈôÑ¡È¡µÄÊÇ12ÔÂ1ÈÕÓë12ÔÂ5ÈÕµÄÁ½×éÊý¾Ý£¬Çë¸ù¾Ý12ÔÂ2ÈÕÖÁ12ÔÂ4ÈÕµÄÊý¾Ý£¬Çó³öy¹ØÓÚxµÄÏßÐԻع鷽³Ì
y
=bx+a£»
£¨3£©ÈôÓÉÏßÐԻع鷽³ÌµÃµ½µÄ¹À¼ÆÊý¾ÝÓëËùÑ¡³öµÄ¼ìÑéÊý¾ÝµÄÎó²î¾ù²»³¬¹ý2¿Å£¬ÔòÈÏΪµÃµ½µÄÏßÐԻع鷽³ÌÊÇ¿É¿¿µÄ£¬ÊÔÎÊ£¨2£©ÖÐËùµÃµÄÏßÐԻع鷽³ÌÊÇ·ñ¿É¿¿£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

Å©¿ÆËù¶Ô¶¬¼¾Öçҹβî´óСÓëij·´¼¾½Ú´ó¶¹ÐÂÆ·ÖÖ·¢Ñ¿Á¿Ö®¼äµÄ¹Øϵ½øÐзÖÎöÑо¿£¬ËûÃÇ·Ö±ð¼Ç¼ÁË12ÔÂ1ÈÕÖÁ12ÔÂ5ÈÕµÄÿÌìÖçҹβîÓëʵÑéÊÒÿÌìÿÔÂ100¿ÅÖÖ×ÓÖеķ¢Ñ¿Êý£¬µÃµ½ÈçÏÂ×ÊÁÏ£º
ÈÕÆÚ 12ÔÂ1ÈÕ 12ÔÂ2ÈÕ 12ÔÂ3ÈÕ 12ÔÂ4ÈÕ 12ÔÂ5ÈÕ
βîx£¨¡ãC£© 10 11 13 12 8
·¢Ñ¿Êýx£¨¿Å£© 23 25 30 26 16
¸ÃÅ©¿ÆËùÈ·¶¨µÄÑо¿·½°¸ÊÇ£ºÏÈ´ÓÕâÎå×éÊý¾ÝÖÐÑ¡È¡2×飬ÓÃʣϵÄ3×éÊý¾ÝÇóÏßÐԻع鷽³Ì£¬ÔÚ¶Ô±»Ñ¡È¡µÄ2×éÊý¾Ý½øÐмì²é£®
£¨¢ñ£©ÈôÑ¡È¡µÄÊÇ12ÔÂ1ÈÕÓï12ÔÂ5ÈÕµÄÁ½×éÊý¾Ý£¬Çë¸ù¾Ý12ÔÂ2ÈÕÖÁ12ÔÂ4ÈÕµÄÊý¾Ý£¬Çó³öy¹ØÓÚxµÄÏßÐԻع鷽³Ì
y
=bx+a£»
£¨¢ò£©ÈôÓÉÏßÐԻع鷽³ÌµÃµ½µÄ¹À¼ÆÊý¾ÝÓëËùÑ¡³öµÄ¼ìÑéÊý¾ÝµÄÎó²î¾ù²»³¬¹ý2¿Å£¬ÔòÈÏΪµÃµ½µÄÏßÐÔ·½³ÌÊÇ¿É¿¿µØ£¬ÊÔÎÊ£¨¢ñ£©ÖÐËùµÃµ½µÄÏßÐÔ·½³ÌÊÇ·ñ¿É¿¿£¿
²Î¿¼¹«Ê½£º
b
=
 
 
xiyi-n
.
x
.
y
 
 
x
2
i
-n
.
x2
£¬
a
=
.
y
-
b
.
x
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

ijũ¿ÆËù¶Ô¶¬¼¾Öçҹβî´óСÓëij·´¼¾½Ú´ó¶¹ÐÂÆ·ÖÖ·¢Ñ¿¶àÉÙÖ®¼äµÄ¹Øϵ½øÐзÖÎöÑо¿£¬ËûÃÇ·Ö±ð¼Ç¼ÁË12ÔÂ1ÈÕÖÁ12ÔÂ5ÈÕµÄÿÌìÖçҹβîÓëʵÑéÊÒÿÌìÿ100¿ÃÖÖ×ÓÖеķ¢Ñ¿Êý£¬µÃµ½ÈçÏÂ×ÊÁÏ£º
ÈÕÆÚ 12ÔÂ1ÈÕ 12ÔÂ2ÈÕ 12ÔÂ3ÈÕ 12ÔÂ4ÈÕ 12ÔÂ5ÈÕ
βîx£¨¡æ£© 10 11 13 12 8
·¢Ñ¿y£¨¿Å£© 23 25 30 26 16
¸ÃÅ©¿ÆËùÈ·¶¨µÄÑо¿·½°¸ÊÇ£ºÏÈ´ÓÕâ5×éÊý¾ÝÖÐÑ¡È¡3×éÊý¾ÝÇóÏßÐԻع鷽³Ì£¬Ê£ÏµÄ2×éÊý¾ÝÓÃÓڻع鷽³Ì¼ìÑ飮
²Î¿¼¹«Ê½£º»Ø¹éÖ±Ïߵķ½³ÌÊÇ£º
?
y
=bx+a
£¬ÆäÖÐb=
n
i=1
(xi-
.
x
)(yi-
.
y
)
n
i=1
(xi-
.
x
)
2
£¬a=
.
y
-b
.
x
£»ÆäÖÐ
?
y
i
ÊÇÓëxi
¶ÔÓ¦µÄ»Ø¹é¹À¼ÆÖµ£®
£¨¢ñ£©ÈôÑ¡È¡µÄÊÇ12ÔÂ1ÈÕÓë12ÔÂ5ÈÕµÄ2×éÊý¾Ý£¬Çë¸ù¾Ý12ÔÂ2ÈÕÖÁ12ÔÂ4ÈÕµÄÊý¾Ý£¬Çó³öy¹ØÓÚxµÄÏßÐԻع鷽³Ì
?
y
=bx+a
£»
£¨¢ò£©ÈôÓÉÏßÐԻع鷽³ÌµÃµ½µÄ¹À¼ÆÊý¾ÝÓëËùÑ¡³öµÄ¼ìÑéÊý¾ÝµÄÎó²î¾ù²»³¬¹ý2¿Å£¬ÔòÈÏΪµÃµ½µÄÏßÐԻع鷽³ÌÊÇ¿É¿¿µÄ£¬ÊÔÎÊ£¨¢ñ£©ÖÐËùµÃµÄÏßÐԻع鷽³ÌÊÇ·ñ¿É¿¿£¿
£¨¢ó£© ÇëÔ¤²âβîΪ14¡æµÄ·¢Ñ¿Êý£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸