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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. i( H8 |* y( g2 |4 C- N5 ]& [+ f
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凯利指数的计算方法:    ( O1 m2 a  L3 d; F& D  k  B# z5 ^9 U% d3 z& X! u
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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)- S4 y* m. l8 d( g4 y/ L9 ]
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 |6 e$ @+ ^; u

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' {& z6 H9 |0 f8 Z& g6 w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!    / |9 c  Z1 @3 e$ X: D- ]% c
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* @1 F* A' }8 ^9 X( k4 F+ v' O$ \做下算术了:    2 i( y$ \  W: ~: {8 \" `
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# }1 s" T. H% I  {2 U. o2 t; B(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n" B9 }4 f8 m7 @2 I7 T

# @3 }# p. G& U6 i+ X$ p7 y(2)立博:    2.10    3.25    3.00   
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& L/ K  s2 q/ }' \+ a(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    6 ^) r% I- M  Z5 E1 G
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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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$ ]% ~' C% \3 M+ \' I  w  ~S1=2.22    B1=3.15    F1=3.01    + u/ m( ?, Z# M4 }
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S2=2.10    B2=3.25    F2=3.00   
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  a% i: y2 q* j. y& kS3=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+ \
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6 s) \7 r* X' S+ Z1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91    , q& ]# w6 Q. V0 X# \, i8 A( z! c3 l- ]
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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% l4 b% E0 s" x4 F1 Z8 m1 u
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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# d' k5 _9 u8 C4 P

/ K# w# |1 N4 L3 d1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90   
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1 T: E  U9 e9 R/ l$ M! IS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T/ ]" G' L8 c' p% g/ h7 l* Z0 j
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类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j3 H! E- {, m$ q  J" E1 A

0 G' Z1 h6 T* u0 ~# GS1'=41    B1'=29    F1'=30;   
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5 K) J! ?  a2 m! U3 RS2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s! g  r5 `1 q) e
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S3'=40    B3'=29    F3'=31    , `2 U5 }( G* H7 _* f2 i! Q
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6 L$ G) `) L  Q# a: vS4'=40    B4'=29    F4'=31    / N" q7 A$ C' y- H5 i
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5 j% ?+ S0 k4 q: U  V(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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( W# f2 s. ^- \! P* r, x0 ~好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41    ( n3 I: x( G1 K3 w+ D: \
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' n5 B* S1 J# \7 c  `B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75    4 I# g$ p. d8 k8 m/ ?

2 R9 D" E. m1 X$ X) dF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    7 k  }2 |7 v+ D" k, |. w8 ^9 U3 D3 e6 Q

0 `! D4 j- m4 }1 t于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?
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% D1 B2 \: w3 FG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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G11=B1*B'=3.15*28.75=90.56    9 n- z! Y3 j& \# a3 c6 b- S

3 a( W, h7 v4 r+ N2 u- H1 TG01=F1*F'=3.01*30.5=91.8    2 b6 B# O% q. }" I: W0 ]$ a+ V* A5 w. \4 ], z
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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 \* V( Y! S7 g/ x) a
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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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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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