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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑6 G1 g. j8 X" \" w1 r, H
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k3 }6 Q* }5 S6 p5 R$ }: j
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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): A; u7 h3 Z$ F! f9 Y+ O
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. [* P3 v( n5 L$ [" @- O* [& H
0 J: o, i' ]1 A Z8 M& t" ]0 @) w! L( u* H% h1 ~5 D" s* X5 t4 l- m( j1 g% 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!
1 ^* n' M) _) q' T0 L; N. G7 e6 Z/ _5 C5 S: K8 T8 s
( U# U+ g& [- X* i做下算术了: 2 i( y$ \ W: ~: {8 \" `9 G% v4 l% i' n) m( D
; ~' L. y! k5 F, M& W+ d- x" M5 l' W# i5 k) i
(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n
+ }0 |3 r) V y) S- v1 | r9 O
6 H$ r6 ]1 q& } N9 W4 R1 m(2)立博: 2.10 3.25 3.00
; j: k* D; J1 `7 C* k8 A& L
+ |$ R1 b& D5 z$ w(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
r( ~" t. |3 [
4 \& N/ d& t% |$ ^6 F7 Z7 G$ t7 L(4)易胜博:2.25 3.10 2.95
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. N2 r- \' ~; r. [! o& R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 l! T( w* f! L6 D# x
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1 `1 n0 D( o% a4 y+ I# \! I0 l ^; ~S1=2.22 B1=3.15 F1=3.01 7 u9 g, B5 g6 J
' J" N) o$ _5 Q2 T% H6 H; WS2=2.10 B2=3.25 F2=3.00 # q+ ?( s$ R$ M" w, l$ E& e
% ^# T/ X4 W2 j% ] s4 b3 x$ A, d8 [" b
S3=2.20 B3=3.10 F3=2.87 " d$ W7 C) e1 b" Q) g4 Z6 t
9 A' e& q. H7 B1 c9 S5 j
, V0 V2 c% @: [) I2 F9 m. [S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \$ A# l5 [- V' K3 w& B- a: u
8 w( d5 ` _0 H- N/ h7 V4 v& Z. d1 G: S5 v0 b0 _' f) g! x
1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91
+ ? k1 \# J1 Y2 n; R0 Y. X- V3 V, c) M* y& u
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
/ h8 x* A- h, e7 u, i
7 ?& n" [# x1 u l" R( v- d0 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+ o7 { ^1 {2 c
& ]0 F% ]/ _; ?* F$ |& z6 {- E5 c1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 % f' w! x, \$ c6 l% X, h9 @
: G+ x9 Y- y- K6 r
4 E6 [+ a4 @" XS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
6 ?3 A- u% ^& q
1 q' h5 K$ l6 J6 h9 N! y类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j9 M4 {3 N- `7 I# x" d
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S1'=41 B1'=29 F1'=30;
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. s- g! i: Q: \8 e$ yS2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s
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0 U2 _! Q8 d1 K# [0 ^4 n' ^S3'=40 B3'=29 F3'=31
+ J9 _' x: i5 a" x2 J* g* ~6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
j; |8 C+ e( {! k6 kS4'=40 B4'=29 F4'=31
0 q4 S* r/ { d* a; z: h0 \: B6 y" Y' M2 }4 T/ O0 g4 ~
6 G( c4 H9 t- t0 V+ N3 v2 T(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# N+ V7 m- X2 Y, h% ]; l5 _9 i
* R9 Y/ Q" p9 \
Q# A' k2 h; `好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 ; {, y( Z+ L* E9 N( P; g7 z
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: [; q% k. \) J CB'=(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
+ K9 n }7 m7 o/ o) I. P9 D* a3 L) F5 t) m2 {
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?7 V) ~7 K% [; [
9 E ]' p: I. D7 h. {
! K2 \; e) n' x9 A4 Q- tG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
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# m. B2 M6 j% y7 ~" e; ~G11=B1*B'=3.15*28.75=90.56 ' [3 u. v$ I: U# C7 {
- s5 M+ r# G* h ?5 KG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]9 T+ O" p3 w2 d4 f2 X3 N6 o
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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 \
. q2 x, x/ O, i( {0 i3 |+ U6 C* |* h W0 f7 S7 s3 A2 @. G$ i0 O6 F9 E5 `: [' l* a' A
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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