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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑
8 w. f, N$ C+ U' P/ _1 A( W* f/ a/ y4 p# R- a1 ^9 v! c! r* q1 c1 s7 k
凯利指数的计算方法: ( O1 m2 a L3 d; F& D k0 h' Q& i: W+ v
, ^# e3 v( \! r% I0 L
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). G; x3 V6 |1 S5 D+ u
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. [, ]. C4 d& l4 X4 A6 ^$ `* w4 @, b; `
% [0 _% y3 \+ w. f+ u8 ~, e
& t" ]0 @) w! L( u* H% h
/ R7 m/ J2 l X* ~. r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!
0 W/ m7 f8 E- d ]5 G6 `7 e6 Z/ _5 C5 S: K8 T8 s
& {: `( ~* o1 o做下算术了: 2 i( y$ \ W: ~: {8 \" `% j+ q% l7 q; r1 M! A( F
; ~' L. y! k5 F, M& W+ d
7 h' z; g5 F/ C# P4 f }( ~+ A& p(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n+ h( M& H" q: ~6 v3 {
0 B! g( \' }, A
(2)立博: 2.10 3.25 3.00 $ g2 `" { f7 l( s
+ x1 v% w8 W. x(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t
' h, d5 b& {2 |5 V5 E) A: e/ M \6 w0 i3 |5 _1 M
(4)易胜博:2.25 3.10 2.95
$ _' S' M# K8 x- U+ {+ l. `) m% ~. _
, b% V+ e9 I% M* \/ n2 H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
$ w: H6 b4 e3 ^. r5 F8 F, p$ }' ]( i% c- Y0 J. n' G+ N) T! w
S1=2.22 B1=3.15 F1=3.01 , z# E4 W% I( x/ }6 j& Q9 ~0 ]& b
1 d F& R7 I) aS2=2.10 B2=3.25 F2=3.00 1 U8 K, m. W. @# j5 i* T+ L
% ^# T/ X4 W2 j% ] s* Z1 {8 j* R# R& ^; v" x' g' m# Q
S3=2.20 B3=3.10 F3=2.87 ! M) d; X- r2 [6 @4 o5 m' p* M6 p0 C
9 A' e& q. H7 B1 c9 S5 j
( ?1 S; W' Q, ^$ S1 n+ b/ [. c" DS4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \) m- B! g2 S8 }4 a" U
8 w( d5 ` _0 H- N/ h7 V4 v
+ T! H% f3 k/ m+ O4 C1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 ' M2 |; `: x/ A) u! u& v. @
$ W! }# e# F8 B6 S1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l% H& l! ?2 f& J# p
|) H! C& |( I1 Q$ X# D1/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
" S( ? a1 `* O/ a4 x1 i2 Q! B
$ [* h: {& f: W1 Q$ x) z1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 ! ~9 l2 o; [( R6 W: _
: G+ x9 Y- y- K6 r
. q8 t+ U7 @+ A5 z: sS1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
$ B: z8 B0 ?) e% ]( J6 V
+ E# O/ I+ [% O# Q0 o类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j3 X+ @. T! D- {( ?8 T6 ^- k
" W4 c8 g: [8 u6 K/ c$ p1 D8 c1 n
S1'=41 B1'=29 F1'=30; % n( C" X; e: N& @7 o
4 k8 Q' q8 m; s5 b) e
S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s5 i# m/ Z" k" A) p
; m' V% T, u, P% O) m$ J# {4 }, `$ A
S3'=40 B3'=29 F3'=31 3 a, x3 N; G0 H8 ]: E; u$ O
6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
$ M+ q# ~+ x% J' V4 Q6 eS4'=40 B4'=29 F4'=31 3 v0 n3 a$ v" b
: B6 y" Y' M2 }4 T/ O0 g4 ~
+ y5 p# u, _& U( J5 S(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. Z _2 {2 ?; {4 e& f* R9 Y/ Q" p9 \
% h7 C% E# {6 c3 P" m6 k4 s. O好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41
3 T# o9 p/ ?% Y) S3 N1 D( p7 a) q( ], k9 L T& t
: l/ X$ i7 U' X5 X jB'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
3 a2 k1 n- L" w6 j# a- B0 T
. a3 o5 B8 ?* k1 H9 e5 Q/ bF'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5
- A/ L- x9 d% R4 B: ^
2 E* r3 ^% v5 ?8 _ A1 g: X# [于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?: u/ G! z6 p& X% k7 T+ m- D
9 E ]' p: I. D7 h. {
# H/ {2 e; }( X: \/ YG31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
) }4 @) n7 q6 ?9 w7 n+ C+ D$ n) P# X# M
t8 c! c' Y9 ~$ Q& e9 ^' hG11=B1*B'=3.15*28.75=90.56
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1 B% n3 p% y& |/ [" f+ YG01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]" l! O3 R, F" L7 N( u. p( d' D
2 q* X. f( F" r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 \
8 @) S' x' J$ U6 C* |* h W0 f7 S7 s3 A2 @. G$ i
. c: V% V1 a$ o* m. b! ?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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