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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
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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)) V4 H: ?3 C3 {3 d+ M$ W& e1 e# J* k
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. [
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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!    ) X( `& n) T" x; H( n& J9 w
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做下算术了:    2 i( y$ \  W: ~: {8 \" `
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" @' g9 U3 J( }9 A' A/ r(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n, e7 V0 k! T) L2 X8 f
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(2)立博:    2.10    3.25    3.00   
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5 \* y' g& W6 E1 |% k+ |2 N( g1 D(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t
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) U6 r& M2 ]7 t$ }/ I) G# Z(4)易胜博:2.25    3.10    2.95    ) b- l. B1 `3 R; ~0 c- j
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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   
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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+ \2 `" Q2 E2 i/ S  R  L
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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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- J& Y9 z. c- L& Z  `5 c2 n3 O1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l) h7 X* j& w8 [: k
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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' q0 a2 Z) k1 s; ?9 h7 q

- _0 ^+ ?' t& S4 A$ [4 V1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90    $ q* E- J8 k, Z# k5 v  l% B
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S1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T1 X, F" ~3 G& |
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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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, {; \  k5 G7 B9 j3 N/ iS1'=41    B1'=29    F1'=30;    ) g2 i  ?6 B0 q1 m
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S2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s- y6 B; {- ^9 x) c- {7 o
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- f, Q1 j  p. |% HS3'=40    B3'=29    F3'=31    2 b% P* J; K: L6 Z
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S4'=40    B4'=29    F4'=31    , U& t6 T) M0 K8 C0 ~5 p% m( E2 {
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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    3 p4 X) \" t+ c9 U7 M2 V
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2 P0 g" f' j% r4 PB'=(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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0 q, @, B5 {4 T6 E/ m于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?& @. ?  B2 k9 m  \
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G31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M' R* P1 l5 q- c6 L
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G11=B1*B'=3.15*28.75=90.56   
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G01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]
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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 \& P# K* \: ]) \+ ^( {$ ^+ \  h: D% p2 I
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9 w  h5 H. s! M/ K( ~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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5#
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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4#
这个太深奥了,看不懂
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3#
进来学习一下
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2#
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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