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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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凯利指数的计算方法:    ( O1 m2 a  L3 d; F& D  k( Q/ ~4 D, W) P- |! H% W6 M
  M7 S% v# T; w# O3 x5 y  K
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)
% b% N. }( l; s( Q. V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. [1 ]; x. _) g& Q. Q
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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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+ a' I: _/ n2 Z/ z- m; Z做下算术了:    2 i( y$ \  W: ~: {8 \" `9 n+ S( P4 z- a+ L! x" w' N- x
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1 {. `; m- f& a* |(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n
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: u8 y2 ^; r" Y" Y" C(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$ [  t7 q7 J; G: e) E' X+ u5 _/ D

% h; B! j0 t* N3 b; x(4)易胜博:2.25    3.10    2.95    1 `4 o, Z; c6 v  ~* Q
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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    7 k& n5 f3 C0 g: y0 M9 S2 j
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S1=2.22    B1=3.15    F1=3.01   
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+ g  ?' r. u5 u! C; ]1 Z7 T* YS2=2.10    B2=3.25    F2=3.00    0 o0 j7 g3 H# s1 J. P
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& }& j# {. A3 I* H: IS3=2.20    B3=3.10    F3=2.87    ) O% [% r1 a; |1 p9 k1 [
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$ g& _3 a1 P- IS4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \2 [4 `9 A1 `: E0 J% d; c8 }
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1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91   
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1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l( X" r& X& h& ?; X" x. @1 Z: ^

0 r3 P, V9 }; s) T1/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' q) R# `! m* A1 r1 T) q( |

5 R6 R6 Q$ o1 N. S0 t( r1 q1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90    . _# L# |. f  F; s) p2 P
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7 \7 w: h7 e+ `* \& CS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T5 h% b! {( H$ F& t2 y$ Q( S

; n0 e) H" g" c% r类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j
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2 H" U2 S  b% S2 l( OS1'=41    B1'=29    F1'=30;    1 G# L3 [) M9 f% S

* R$ L  \' H: XS2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s
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5 V2 p2 }1 w# ?7 ^/ `( NS3'=40    B3'=29    F3'=31    6 c/ e- r1 M7 Q! I
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S4'=40    B4'=29    F4'=31      J4 [2 ^) ^; S1 [) h$ O' s
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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
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41      i% ~% W( h% h( ]. Z$ L
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9 V) n9 P3 b& t* eB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75    " W4 p' m( B+ P

9 d/ {9 c. O& P/ c# U- XF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    8 Q% N( D  T; V: t) G) |+ x

( P  }: z8 H" \" [于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?7 E: S8 o' K/ q2 Y
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8 r" v  g3 O0 A7 b9 H" vG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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+ r9 {" K1 n' A9 N5 CG11=B1*B'=3.15*28.75=90.56   
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8 {% ^" o# o/ D' i! r  }" P1 V4 l% qG01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]  ?( S$ Y7 u- v" Q+ H

" z, A2 H: ], n5 q2 U: o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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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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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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