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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑) G& ~3 |& {/ _1 P. I9 K2 Z2 P
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k# d0 ]6 f& p; ^
9 q d% Q5 X& ?# c
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)
1 U& J a4 G& i4 Q' B9 o- J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. [! Q$ r- O- s/ ~6 { h( Y& p- B
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& t" ]0 @) w! L( u* H% h
; Y) C! X6 X7 k% h# 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!
) M# {8 x5 R) q9 m7 e6 Z/ _5 C5 S: K8 T8 s& X3 j: o8 q+ F# t4 I: o1 c( [
做下算术了: 2 i( y$ \ W: ~: {8 \" `5 y; R* C) ~, I: q7 U. j
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n7 ?6 s- G7 D6 J, M9 P9 u* ?5 Y
' s6 @0 e% m: M. A. l2 `; g(2)立博: 2.10 3.25 3.00 + A$ V' T. } m
* ]: b8 [; i8 o
(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
9 _3 M8 T3 | f( P* o8 _
* B* O. B m9 J" Y" f# f(4)易胜博:2.25 3.10 2.95
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8 H7 M: F' R& u Q& X, A! d; `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 ! @+ s$ N* s1 X n" r$ q) K. `
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1 i0 E' P( Y+ s2 A5 `: g6 W- Q. \9 SS1=2.22 B1=3.15 F1=3.01 ! ] K a8 |) L7 }4 L
, Q* Q4 M# f" q* O6 M' fS2=2.10 B2=3.25 F2=3.00 + w+ t( Y7 e! S" n& y: W
% ^# T/ X4 W2 j% ] s
4 k- B% D4 J3 [9 a, sS3=2.20 B3=3.10 F3=2.87 1 w# V. X4 m0 G5 h1 I: m F
9 A' e& q. H7 B1 c9 S5 j
2 J4 Y4 }8 Z1 ?4 D$ T% F) AS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
/ c4 g$ o3 d4 z3 A e4 A& n& |8 w( d5 ` _0 H- N/ h7 V4 v5 f5 i" h( e7 `1 J& |* j1 r
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 * Y2 C' | n( x! @) b2 ]
& N. n3 h3 {/ d& d; k1/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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0 ?% u% s2 J& E) Y+ G$ f1/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' q2 e' z8 q, }* D9 F* `1 X/ V
$ t7 F1 W6 h: e9 R! n& U1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90
+ t5 s$ v, i( G& b: e( W- K: G+ x9 Y- y- K6 r8 c, x/ E8 k( Y7 K, j- X
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T4 {, J' E8 C; |5 Y9 G3 B) z/ k
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j) m% q: z% D9 g
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S1'=41 B1'=29 F1'=30; 6 n/ G3 R/ | V& K( d4 Z' f
7 i) O6 [! {( W* k9 J0 M% l' `S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s$ c' Q8 v' G3 a
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S3'=40 B3'=29 F3'=31
+ p* T9 k' O. p$ y) d2 ]6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
# t7 D: Z6 h9 j7 oS4'=40 B4'=29 F4'=31 * l- {* S8 S1 `' @/ b
: B6 y" Y' M2 }4 T/ O0 g4 ~( o' M/ h4 J7 V( G& J( y0 M
(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
2 r+ J. |+ e: U& c8 A7 y6 k) q( ], k9 L T& t, }2 p! \1 n- K
B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 , @9 B; R) ~# @$ z) {" ?/ p
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F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
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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: T; p! d0 ^" ^7 V7 W
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/ U* y2 ~; Q1 M3 c) [ l! f1 ]* EG11=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 ], G% O( k7 D, U- W& `7 S- V
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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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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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