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[体育菠菜心得方法] 凯利指数的计算及在足彩中的运用
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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
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4 }5 s) h" w! Q0 w# G! o凯利指数的计算方法:    ( O1 m2 a  L3 d; F& D  k0 y5 I/ A9 W# r( d* H  b# D" x
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G3=S*S',G1=B*B',G0=F*F';(S:胜赔,B:平赔,F:负赔,S'欧平均胜率,B'欧平均平率,F'欧平均负率)+ ]9 W* L5 x  Z4 b' p
什么?对于一家特定的公司,它的主胜的凯利指数G3=S*S'!你选择的公司样本不同,G值就不同,样本大小不同,G值也不同(一般的欧均值都取99家公司,从统计学的意义上来讲,还称不上样本!)这个G带有随意性,大个0.05小个0.08之类的,也只能算做误差,现在要我比较G与0.89哪个大?我大你个0.05怎么了?我小你个0.08又有什么干系?  H% P+ \' B9 l  U8 T. [2 c: S4 a- C) V7 y" X; E% N5 u

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& f4 D( h+ \5 j7 l. q, ^既然涉及到平均胜率,那么看一下胜率是怎么求出来的:平均主胜率S'=(S1'+S2'+….Sn')/n,S1'是第一家公司的主胜率,S2'是第二家公司的主胜率,以此类推。主胜率S'=r/S(r:赔付率)。赔付率(返还率)又是这样求的:r=1/(1/S+1/B+1/F),什么??又做梦了!!返还率是庄家也要到裁判终场哨响才知道的,这样也行??AC米兰踢亚特兰大,哨响了,投注比固定了,但踢出3,这场返还率可能是150%,踢出1可能是20%,踢出0,可能是5%,结果不同,返还率也不同啊!这里也可以看到,博彩公司不喜欢操控比赛,因为他想操控的只能是这种强弱分明的比赛,但强队踢假球的成本更高,它想操控也操控不了,最好的选择就是烧烧香:天哪,爆个冷吧!   
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做下算术了:    2 i( y$ \  W: ~: {8 \" `
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3 {* S# t  |% h* p2 ~(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n, ^) l+ }( u! W

: _- z% T& m* g! q7 n(2)立博:    2.10    3.25    3.00   
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(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t
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(4)易胜博:2.25    3.10    2.95   
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我们假设就取这四家公司为某场比赛开出的赔率来计算凯利值   
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S1=2.22    B1=3.15    F1=3.01   
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S2=2.10    B2=3.25    F2=3.00    7 z" D4 f7 ~# s0 B3 I8 t
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S3=2.20    B3=3.10    F3=2.87   
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% l8 R# Y% L* A$ H+ b" {. a) X* ~S4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \
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. f/ ?! F$ G7 ?0 g* J1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91    $ \# C+ `) t5 n% I

) p+ C# y8 D6 T6 ?- |/ n5 W1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l8 w  f2 _* n1 X8 e
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1/r3=1/S3+1/B3+1/F3=1/2.20+1/3.10+1/2.87    =>    r3=0.89    % h8 r* k9 }8 X/ Q5 J' q7 J1 {( U% J- Y( A* F7 Q; N

) B, K! C% D8 D+ t3 [0 G) y1 H3 c1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90   
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. o, n8 j1 s1 f* W/ B) H' j2 hS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T! T5 }. r$ g1 Y$ u& t7 {
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类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j% o, B1 v. w; y) o* Y
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S1'=41    B1'=29    F1'=30;   
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# v3 Q% A5 E. R& w0 L) Z" a0 mS2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s
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' {& c+ B, Z& ]; R8 ?6 US3'=40    B3'=29    F3'=31    - f0 p( i, v6 w& F
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S4'=40    B4'=29    F4'=31   
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(注意:3,4两家公司,赔率不同,但它们的胜,平,负率相同了)    8 [+ b0 b& X# U( [. o; M9 _' V. g: ^1 [: D& X% Y7 h: f% ?
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41   
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0 c$ @$ L# U. r0 DB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75    ) D8 s. w1 }4 r3 V

! q3 {8 r7 E& b: B% DF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    - M4 Q( _, C( m* y# s/ v9 U7 ~) B% D

9 T5 }6 M7 n( r4 f  i于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?
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; R4 z* T/ K1 v0 f7 D. EG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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" ]0 y$ b% P) M, q9 SG11=B1*B'=3.15*28.75=90.56    : d2 H' ~$ j8 x# J. @
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G01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]1 h; z6 Y  M3 k' j2 M: Q" E  {: r" l7 ?
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当然其它几家公司的凯利值也可以通过同样的方法求得,当然,事实上你不用去求(每场比赛这样求,不累死也气死了),赔率比较网站上都是这样算的。    好,到这里你应该可以知道了,凯利指数是怎么样被扭曲的了,因为除了赔率是真的,其它的都是做梦的时候梦到的(并非是攻击凯利指数,这个,前文和接下来的一比较就可以发现了)。    + J& N& @* n# J/ ]6 \
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9 X( k) s' J/ ]. l; U/ q通过对多家凯利指数的对比统计分析可以找出,数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。
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数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。
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3#
进来学习一下
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这个太深奥了,看不懂
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主题回复处广告图案-天策传媒
这么高深 概率论研究的很好啊
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