̬·Ö²¼¸ÅÂÊÃܶÈ
±ê×¼Õý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯Êý ¨C ÊÖ»ú°®ÎÊ
±ê×¼Õý̬·Ö²¼ÃܶȺ¯Êý¹«Ê½:f(x) = exp(-(x-¦Ì)^2/2¦Á^2)/¦Á(2¦°)^(-0¡£5)Õý̬ÇúÏß³ÊÖÓÐÍ,Á½Í·µÍ,Öмä¸ß,×óÓÒ¶Ô³ÆÒòÆäÇúÏß³ÊÖÓÐÎ,Òò´ËÈËÃÇÓÖ¾³£³Æ֮ΪÖÓÐÎÇúÏß¡£
Õý̬·Ö²¼¸ÅÂÊÃܶȹ«Ê½ÊÇʲô°¡!
Õý̬·Ö²¼µÄ¸ÅÂÊÃܶÈÊÇ£ºf(x)=exp{-(x-¦Ì)²/2¦Ò²}/[¡Ì(2¦Ð)¦Ò]¡£¼ÆËãʱ£¬ÏÈËã³öƽ¾ùÖµºÍ±ê×¼²î¦Ì¡¢¦Ò£¬´úÈëÕý̬·Ö²¼...
Õý̬·Ö²¼¸ÅÂÊÃܶȺ¯Êý?
±ê×¼Õý̬·Ö²¼µÄ¾«»ªÔÚÓÚÆä¸ÅÂÊÃܶȺ¯Êýf(x)£¬¹«Ê½Îªf(x) = (1/¡Ì2¦Ð) * e^(-x^2/2)£¬ÆäÖÐe^(-x^2/2)±íʾeµÄ-x^2/2´Î·½£¬¶¨ÒåÓòº¸ÇÕû¸öʵÊýÖá¡£Õâ¸ö...
ÔõÑùÓÃͨË×Ò׶®µÄÎÄ×Ö½âÊÍÕý̬·Ö²¼¼°ÆäÒâÒå?
Õý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯ÊýΪf(x) = 1/¡Ì(2¦Ð¦Ò^2) * exp(- (x-¦Ì)^2 / (2¦Ò^2))¡£ÆäÖУ¬¦ÌÊǾùÖµ£¬¦ÒÊDZê×¼²î¡£¶ÔÓÚÈκÎʵÊýa...
Õý̬·Ö²¼µÄÃܶȺ¯ÊýÊÇʲô?
Õý̬·Ö²¼£¨Ò²³ÆΪ¸ß˹·Ö²¼£©µÄ¸ÅÂÊÃܶȺ¯ÊýΪ£º\[ f(x) = \frac{1}{\sigma \sqrt{2\pi}} e^{-\frac{(x-\mu)^2}{2\sigma^2}} \]ÆäÖУ¬\( \mu \)...
Õý̬·Ö²¼¸ÅÂÊÃܶÈÊǶàÉÙ?
Õý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯ÊýÇúÏß³ÊÖÓÐΣ¬Òò´ËÈËÃÇÓÖ¾³£³Æ֮ΪÖÓÐÎÇúÏß¡£Õý̬ÇúÏß³ÊÖÓÐÍ£¬Á½Í·µÍ£¬Öмä¸ß£¬×óÓÒ¶Ô³ÆÒòÆäÇúÏß³ÊÖÓÐΣ¬Òò´ËÈËÃÇÓÖ...
Õý̬·Ö²¼µÄÈý¸ö¹«Ê½ÊÇʲô?
1. ¸ÅÂÊÃܶȺ¯Êý£¨Probability Density Function, PDF£©£ºÕý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯ÊýÊÇÒ»¸ö¹ØÓÚ±äÁ¿ x µÄº¯Êý£¬±íʾÁ˱äÁ¿È¡Ä³¸öÖµµÄ¸ÅÂÊÃܶȡ£Õý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯Êý±í´ïʽ...
Õý̬·Ö²¼ÊÇʲô?
ÔÚͳ¼ÆѧÖУ¬Õý̬·Ö²¼£¨Ò²³ÆΪ¸ß˹·Ö²¼£©ÊÇÒ»ÖÖ³£¼ûµÄ¸ÅÂÊ·Ö²¼¡£ËüÓÉÒÔÏÂÈý¸ö¹«Ê½À´ÃèÊö£º1. ¸ÅÂÊÃܶȺ¯Êý£¨PDF£©£ºÕý̬·Ö²¼µÄ¸ÅÂÊÃܶȺ¯Êý¿ÉÒÔÓÃÒÔϹ«Ê½±íʾ£ºf(x) ...
Õý̬·Ö²¼ÔõôÇó¸ÅÂÊÃܶȺ¯Êý?
Õý̬·Ö²¼ÊÇÒ»ÖÖ¸ÅÂÊ·Ö²¼£¬Ò»°ãÓ÷ûºÅ¦ÌºÍ¦Ò±íʾ¾ùÖµºÍ±ê×¼²î¡£Æä¸ÅÂÊÃܶȺ¯ÊýΪ£ºf(x) = (1/¦Ò¡Ì2¦Ð)exp(-(x-¦Ì)²/2¦Ò²)ÆäÖУ¬¦ÌÊÇÕý̬·Ö²¼µÄ...