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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% ?9 J5 s& l  K3 Q7 _; t% P

4 K3 h7 h" S2 O3 UG3=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). r6 }. J: ?% E3 d, l
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. [5 }& W3 k7 R& J9 W' r
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2 Z7 n" C1 O" l" ~; t4 L8 Z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!    ; e5 ]% Z% n2 Q4 A3 }5 r: G% N, u
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5 c" u+ \8 O" `3 \, y1 i$ C做下算术了:    2 i( y$ \  W: ~: {8 \" `
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$ e1 f. ]! c) u% A* V6 J(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n' ^; o9 v. d& r' q$ P

1 h( A4 @$ W, E$ c(2)立博:    2.10    3.25    3.00    - o" ]* g; [# t' V0 q, ]
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(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t9 z4 Z9 l' w% D) `7 X1 X, u! `3 Q

4 [& y% A3 `  l7 E) a9 X! {" V# b1 W5 r(4)易胜博:2.25    3.10    2.95    5 v* z6 k/ |$ J" C6 ]6 _! Z) i; c
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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    6 W. `8 p* D  m( W* `% q/ b. o

" l8 ^- R  s9 s/ KS2=2.10    B2=3.25    F2=3.00    6 A2 o$ v# T2 D0 ?
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S3=2.20    B3=3.10    F3=2.87    " r2 y. x: p, D1 w3 A
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S4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \" }" k- _$ @, C3 u1 P
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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% l0 e2 Z& L/ w0 q$ i

3 P+ p! K- u7 \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
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. }6 w( v& C1 X  v! V0 O0 K  m1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90   
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* F% Q0 R, n3 k, Q; x" w6 B8 g4 YS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T4 F; Z8 ]5 W3 o9 B& C9 s

, Q- |( y! Z' I* B) g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;   
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S2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s
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' F0 _7 n" _3 h' k$ x1 N9 U. WS3'=40    B3'=29    F3'=31    ; ^  F% q; A' z1 q
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, F$ g0 m; z" f) s& j' g. nS4'=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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/ b5 o8 g* }1 X4 |6 wB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75   
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7 }1 U% |; D+ F( |/ Z* C5 \" }F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5   
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! g) Z2 u% v* p* I  B8 w3 t: n, a, x& ^于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?' h- G5 M& [( d$ k4 v  k
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, {: O7 ^. \, C1 k0 HG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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2 n7 U% _: c7 `# j* O2 IG11=B1*B'=3.15*28.75=90.56    / C7 F2 g$ B( u) e3 z- \3 U

6 \/ y) d, l* I3 n" TG01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]. a+ c6 S$ U  b$ I- k! `

; k& [- q8 c) c" k) E8 P4 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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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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