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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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# @7 P1 N4 P1 s  G8 {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)
4 h8 i* x; D' r! u1 Q5 b3 v" I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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, \, p/ D( u' v! o' x6 l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 \" `0 s: v, J! z$ a# K: r
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" x9 ^; [: l7 O  t6 U6 j(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    2 A- {& e/ v/ i0 G/ m/ U6 j0 i/ d

( k: |2 p& ]# A(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t
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6 T  K' e, K' p  \$ v& ~(4)易胜博:2.25    3.10    2.95    ' T6 E% ?: {6 M" Y3 g* E# t
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5 l) h. C' T4 B! @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    5 H3 N4 m0 y: ^9 @$ C+ `
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3 }' A) D+ M6 c7 K' \0 yS1=2.22    B1=3.15    F1=3.01    " z9 Q- y0 s! j/ F$ \) E$ Z+ b

. G: @5 f' A4 c* x/ L4 {8 D  xS2=2.10    B2=3.25    F2=3.00    & [+ B. m3 W& n$ l$ G
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S3=2.20    B3=3.10    F3=2.87   
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$ O6 o) S  j0 M' Q& {; mS4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \5 k) H" w+ I( a( h1 i- n
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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% l! `8 \7 T7 p" V
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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
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) \* ?, s4 ]) n. y4 q9 p, I1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90    1 P! I' o# D* v' p
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% n- }1 H" W, R: K( lS1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T' i' d7 s0 l" V) `6 z, g' M
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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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3 j; m, c! Z8 C. Y3 e) P" XS1'=41    B1'=29    F1'=30;    " x6 b5 x9 `4 O" l9 n( _+ N4 N  @
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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   
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S4'=40    B4'=29    F4'=31    3 p" C' W% h* ~2 e. ^! b/ z
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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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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75    $ U( ?& l6 ~9 i- w& R; e
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    3 _$ ?( v$ c0 @0 V9 M4 |% [

$ b# X! q8 W& Y于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?
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G31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M
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# ^$ i, y; ~, o. ?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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: C7 B# Y8 b$ ^0 w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 \+ B9 g" Z$ f" p2 q  K
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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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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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