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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+ ^* a$ P: c2 F" s

+ f. |2 E" Q- XG3=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)( _. e* G- S0 x: g6 d( b7 ]5 G
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. [6 p+ q1 e$ c0 ?7 S) B
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" K. L. n) h2 e! u$ J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 \" `1 G7 b1 e$ O. r- [& ?( D
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(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n
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(2)立博:    2.10    3.25    3.00    ; q4 P4 d8 J$ _$ H! c5 r6 x

1 k, {% t6 y  n(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t
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/ e3 F# k- b) _5 s(4)易胜博:2.25    3.10    2.95   
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. Z# B& s8 q  f' m5 T* U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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' M( y& Q" d7 M2 j3 H, R5 IS1=2.22    B1=3.15    F1=3.01   
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S2=2.10    B2=3.25    F2=3.00    5 D$ s8 H- B8 |6 O- c
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S3=2.20    B3=3.10    F3=2.87   
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S4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \9 h, V+ u) t% w7 T
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$ D# I4 Q- q1 t5 D! [/ I# K1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91   
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/ _1 I, i9 w& x* s+ N1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l- j6 O& W. H7 ?4 ]
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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' q# K0 O, e% s3 J
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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90   
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S1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T. Y6 }# g9 a- x- p7 |
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类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j
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S1'=41    B1'=29    F1'=30;    ( q& d* M( A" B6 d( ~2 f) Q7 w8 f/ T9 Q

) s# \) h' u% F1 C9 L+ nS2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s4 C' b. }3 F7 n5 R  N
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  ?7 t* y* f' }' w3 d4 W' C6 rS3'=40    B3'=29    F3'=31    , B0 r  R7 F( S0 Q$ T5 `
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8 s+ ~2 m+ i# \8 j5 pS4'=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
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好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41   
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75   
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5   
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于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?; q+ W! ?0 X3 {+ A; H
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" X' W1 k& t$ n; F! l& IG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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5 e/ k* n  ?/ A1 T9 w1 F  hG11=B1*B'=3.15*28.75=90.56   
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' \- o' z2 O* c% A; [. a  SG01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]
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8 |) O+ k4 Q+ f6 d' ]" [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 \% v5 T8 s  D- m5 W; R6 c5 b
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6 [4 d6 |+ q( P# A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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