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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑8 e) y% x ]/ J: @: c! f
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9 M. I2 Y4 V( j0 f) {凯利指数的计算方法: ( O1 m2 a L3 d; F& D k; h o- ?! S" S" `: W# p) X
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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)
/ `9 t& V: ~' Y" C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. [
# x3 G; g. X/ E, G+ Q, C9 i% Y2 Q
& t" ]0 @) w! L( u* H% h( X# n; U( M% R; I `5 g k5 I: i. G
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 \" `# N5 N# K9 c' h
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(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n! O, V; I2 B" R) ^
* m4 m& x% Y @2 @& t
(2)立博: 2.10 3.25 3.00
; [8 o1 }. q! r- O O9 Z1 T
& Q) i2 Q5 M7 b5 T8 r* m1 G0 G) Q(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t! n2 f! S/ N3 n8 K6 o
( Z# _2 j8 G; Q3 P; `! n2 W0 K
(4)易胜博:2.25 3.10 2.95
. m7 ?' y: C7 T6 a2 i' r) Z* E3 o y: T- U+ {+ l. `) m% ~. _. K0 I( [; V& V3 L
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 p, R W6 \+ D) N
5 F8 F, p$ }' ]( i% c5 h: Y3 _: q O7 k n
S1=2.22 B1=3.15 F1=3.01
4 q1 o" v9 [& _3 `6 W0 I H* g/ n# ]; w5 }+ V- ~5 ]: D
S2=2.10 B2=3.25 F2=3.00 9 e/ h# x5 a7 G5 v1 t8 L( O' |
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S3=2.20 B3=3.10 F3=2.87 / n7 @9 U( q: A
9 A' e& q. H7 B1 c9 S5 j" t+ y9 C$ r6 B4 C0 ?) S
S4=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 9 ^" L# g8 v9 P' ?# D. ~ O
. K0 l8 }9 d6 e6 e w6 j5 J8 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+ o+ X' p" s# f& D; t
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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' q2 V8 K; ]( }3 A* z# M/ A" ~' l
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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 H9 X4 G$ T$ q' e: G+ x9 Y- y- K6 r
& j* J: b {' _7 o6 T' G: TS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T4 j) q' h! v$ ?
- w6 V1 a( ~$ }; @6 Z) K类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
2 _+ c% i( d9 `5 ^
4 T% ^2 U' i+ } R: q6 z# G" zS1'=41 B1'=29 F1'=30; 2 z* r% F/ t. _9 i' [6 i
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S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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. Z9 M/ H9 W ?! n7 n, WS3'=40 B3'=29 F3'=31 ; @' ?! s, ?" S2 `
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2 k- P$ Z! K: `9 q6 gS4'=40 B4'=29 F4'=31
5 m3 v+ G( s3 X. I: B6 y" Y' M2 }4 T/ O0 g4 ~% ~: |' `& X/ l q/ |
(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 / M7 S; R3 m6 B; S& Q$ f. y
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B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75 . H& H, Z7 c+ X
( K3 _" c& f! @& p2 MF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
r6 c6 E" }- U+ Y. H3 K8 k
$ U; j; F0 a; o' e) t$ C于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?& V o8 @# e/ W
9 E ]' p: I. D7 h. {1 y& M' V" R: b7 [% |+ u
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M! W! h9 ^' f3 _6 @' Z% f! g j. e9 W
+ D$ n) P# X# M
- f4 _4 W+ f( JG11=B1*B'=3.15*28.75=90.56 0 M( ^7 S1 V( R0 O% ~, q5 M
4 ]% M/ x0 y3 v
G01=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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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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