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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
5 O$ J5 S* p; F9 E4 [7 F& V. ?" F
  r- @$ }' Z1 L9 v' c% 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)
& m7 _) x/ y& C3 X4 D" w* A- X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. [+ i( q" o8 h1 i1 B9 W4 q

. L5 x) m: D8 X' ]% @& t" ]0 @) w! L( u* H% h
0 Z* U+ e: r; p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!    ( Q7 k# ?  k0 H" j1 _2 c6 o
7 e6 Z/ _5 C5 S: K8 T8 s6 _/ P- U- S% N$ K# E. i
做下算术了:    2 i( y$ \  W: ~: {8 \" `: ?9 k6 u- {( t2 S! f6 q; f
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9 Q' v0 X0 T2 C3 ^# s, f' W(1)SSP:    2.22    3.15    3.01    : `4 u/ N9 a2 y  W3 e8 }9 n6 m6 q; F: I, |% Z4 T* C! o

1 h  X, z3 H( U3 n! p7 s5 z(2)立博:    2.10    3.25    3.00    ( f# M& `2 ?* G
& q+ \8 y' H' W
(3)威廉:    2.20    3.10    2.87    : D' ~# K. v* J, ^* k$ [  t* g( p# r' D- {' \. l( E3 ]

0 R) n6 T& f; Q0 d; Z(4)易胜博:2.25    3.10    2.95    / O; A& v; q3 x7 {  w) p
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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    3 Q; X! D8 A: `4 W  D$ B; M
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S1=2.22    B1=3.15    F1=3.01    ! L2 H% L: z3 K& U# C+ D+ f

, v% y: B" n* e5 DS2=2.10    B2=3.25    F2=3.00    9 u& d1 M0 G! v! _0 s
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S3=2.20    B3=3.10    F3=2.87   
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: D" D; ~; k3 y9 `- M0 KS4=2.25    B14=3.10    F4=2.95    ! ~0 p7 C' v# @. v; y  G+ \
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2 W$ w- n1 l; V1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01    =>    r1=0.91    & @& u8 A* A! E4 ?4 o

6 H& N. @1 f, G, J; q8 H- h, e* P1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00    =>    r2=0.90    # t0 ?( P  e* X% l- u$ x! j( H$ [6 B% x( _$ ?

; D$ K+ u' s( B* T8 {9 `/ {% S1/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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1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95    =>    r4=0.90    + @4 _3 U6 j! U2 }" H2 k
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S1'=1/(S1*r1)=1/(2.22*0.91)=41    : W# q# m$ g# T  p1 @+ j4 e. [9 Z# [2 z4 b

. q) g: i$ }, j类似的计算后,于是:    # s3 M- z! s6 q8 s- Z8 M  j
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( F" I( @+ Y: d, R" ~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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9 U) e4 A! h/ ^9 SS3'=40    B3'=29    F3'=31    9 z2 e+ z( g0 X3 X) C, i
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S4'=40    B4'=29    F4'=31   
  [1 |7 e! E5 a& y  v$ m2 X: B6 y" Y' M2 }4 T/ O0 g4 ~, P& ^' m. S5 u* t) 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
* [8 F* I5 }* X+ ?7 r  N7 Y* R9 Y/ Q" p9 \! s2 c- Z/ O7 D' @; O' k  d$ o
好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41    2 G& `6 k3 ~% ]
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75    1 ^. ]& E3 a1 K7 E

3 R+ X* A) Y1 S  Z: m. |7 `/ B/ qF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5    0 P7 D% B( J% y/ |3 a

4 [4 ?4 ^! v7 L; w) g7 z于是:    / s+ X- G$ g6 i& P  E8 u9 j! |0 ?" e) N% J4 o9 I: ^+ N
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G31=S1*S'=2.22*41=91.02    ! B$ E, |, X) y+ M! j  q. g3 |: M- z5 T
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1 Z' {% ~" @" c% o6 N  B# e4 ?8 uG11=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 ]+ d( t" x5 a9 a* x
5 E: u9 w1 \5 T" M$ i, t* k: h
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 \) C% v  @! A) M0 k
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: ^  ^$ R7 d  j. ]3 a/ l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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