Ga usah pake formula macem2, Brazil emang selalu jadi unggulan
pertama. Gue mikir2 apa ya yang bakalan jadi kejutan gede kayak waktu
Perancis ma Argentina ga lolos grup di WC 2002. Prediksi gue antara
Belanda atau Argentina ga lolos grup. Juga Brazil. Inget, Jepang bisa
dua kali nahan seri Brazil di Piala Konfederansi. Kroasia bisa
ngalahin Argentina dan imbang dengan Brazil di ujicoba. Satu tim lagi
yang jadi calon ga lolos, Perancis. Kalo Korsel bisa tampil heroik
lagi dan Swiss bisa tampil kayak di penyisihan (ga pernah kalah dan
dua kali imbang dengan Perancis), siap2lah Henry cs angkat koper lebih
dulu.

=========================================================

P(n) = λne-λ over n! is the formula for World Cup success

Denis Campbell
Sunday May 28, 2006
The Observer


It may look complicated, but this is the mathematical formula that
promises to take the frustration, misjudgment and wasted bets out of
predicting football results.
The good news is that punters should now be able to win a fortune. But
the bad news for England fans is that academic experts say that,
mathematically, David Beckham and his teammates have little chance of
winning the World Cup - just five per cent, to be exact.

Decision Technology, a firm of prediction experts who claim to be the
best in the business, has invented a computer program that boasts a
better record than any bookmaker, pundit or sports tipster. While most
bookmakers rank England as second favourites behind Brazil to land
football's greatest prize, Dectech ranks Sven-Goran Eriksson's side
ninth in the list it has produced to estimate the chance each of the
32 teams has of lifting the trophy. Brazil have the highest
probability at 13.1 per cent.
In a statement that will not readily make the first line of a new
football chant, Dr Henry Stott, firm director and visiting fellow at
Warwick University, said: 'Our modelling technique involves maximum
likelihood estimation and a kind of rational probabilistic analysis to
predict what the outcome of a match will be.'

The computer has studied the scorelines of 4,500 games between 200
countries since 2002 and come up with forecasts for every match at the
initial group stage.

'England have an easy group and so an 80 per cent chance of reaching
the knockout stages. After that the games against tough opposition
such as Germany and Argentina come thick and fast. That's why we have
made them only ninth favourites to win. With or without Wayne Rooney,'
said Stott.

If the system is as accurate as its inventors claim - it has correctly
called 53 per cent of Premiership matches since 2002, better than
anyone else - fans can stop relying on hunches, advice from friends
and listening, for example, to newspaper tipsters, who score a measly
43 per cent.

Stott says anyone seeking to make a profit on events in Germany should
back France, Holland or the Czech Republic, whose chances, he says,
have been underestimated.

According to Stott and his colleagues, a combination of science and
mathematics shows that, after Brazil, the next nearest favourites are
France, who did not score a goal at the last World Cup, Germany, who
even Germans admit are an unexceptional team, and Holland.

For those with a degree in statistics: in the equation, 'n' is the
number of goals scored, 'lambda' is the expected number of goals, 'e'
is a natural logarithm and the exclamation mark is 'factorial', a
function of 'n'. P is the probability distribution of goals scored.
Well, we said you needed a degree.

'We knew we were on to something at the 2002 World Cup when, despite
France being 10-1 on to beat Senegal, they lost - an outcome which we
had said was a 25 per cent chance,' said Stott. He and his colleagues
are so convinced they get it right more often than anyone else that
they are betting £50,000 of their own money on their predictions.


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