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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# @3 D  ?; g  R* @7 m' V3 W; C
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/ E2 t  x+ J! c$ ~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)
7 D+ o4 j& C, A5 s3 ^# N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!   
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做下算术了:    2 i( y$ \  W: ~: {8 \" `  C: A! _7 y* z+ t; ]  R% B
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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   
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9 K) m8 q- n6 q5 h2 ?. O; S( Q(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t; j7 R+ [) e- B; ^3 c

* v% u; c; C1 @% [  D% x  ]" T(4)易胜博:2.25    3.10    2.95    ; A3 J# a! d8 M2 N0 Y
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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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8 N. t; u6 L) `% J1 zS1=2.22    B1=3.15    F1=3.01    $ f, ^$ P% Y( b* q# i2 w

# U4 D. A9 D" A7 g( j, w2 bS2=2.10    B2=3.25    F2=3.00    , D' Q$ A( [' T% ]
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+ T, J* k  R. i. B$ a! XS3=2.20    B3=3.10    F3=2.87   
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# C5 k+ N2 |+ u/ A, l! bS4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \
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1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91    " c# F. {( u7 N: j

% h; ^3 |( `- j9 \  Q1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l
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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$ k- }5 y! A& R% T- c' [: D4 E  u& 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    ; \$ V# Z; \! t+ ^" S2 L% _
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: d, E4 N# Y) t( Y& yS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T
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4 s+ ^# r9 Y+ ]$ Y# A1 l( o类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j
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0 u. A- A) Y$ \) o3 s! Z' Y  u: d: SS1'=41    B1'=29    F1'=30;    # l$ F, q$ l) L0 r: p, P
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S2'=43    B2'=28    F2'=30    3 e- T: x' @% _% l" w5 s
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S3'=40    B3'=29    F3'=31    8 v1 \  j5 l3 v6 ~$ z
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4 \. S7 t1 U' Y6 V5 OS4'=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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5 `% p: e3 h+ `1 @5 m好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41   
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' [, f9 W7 F0 z  f; G3 Q  JB'=(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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- n6 u+ m6 w6 O+ u- `3 U7 Y# x  c于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?# g7 W, \; H, e0 ^8 \+ s! |
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. I: h  L5 X; D0 t" C8 }3 ]) N& `4 FG31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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7 i7 L, o. O6 ~G11=B1*B'=3.15*28.75=90.56    1 h9 o* w: B# G& i

6 c' V9 T2 c# N  D) P; a1 E$ o) tG01=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 \
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' L8 J7 R, @8 L" ?' t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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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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3#
进来学习一下
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4#
这个太深奥了,看不懂
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5#
这么高深 概率论研究的很好啊
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