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How is Football Power Index Calculated

Author:Football Prediction SiteDec 28, 2021, 15:40:32Read times
DescriptionThe source of the strength index and the specific calculation of the strength index, but the strength index itself is only a number with an absolute value within 500. Although the larger the value, the greater the difference in strength bet
The source of the strength index and the specific calculation of the strength index, but the strength index itself is only a number with an absolute value within 500. Although the larger the value, the greater the difference in strength between the two teams, but when it comes to the results of the game, what is the difference between the two? What about the specific connection?
From the calculation of the strength index, we can know that to measure the offensive and defensive ability of a team, the abstract concept is that they have played against a fixed strength team 100 times and take the average number of goals scored and lost. Assuming that the absolute value of the strength index of a certain game is 100, it means that in 100 trials of the game, the strong team will beat the weak team by an average of 1 goal per game. It is not difficult to see that the strength In a game with an index of 100, the stronger side has a huge advantage. But this is only a conceptual understanding, which is too broad for the result forecast and is not of great reference significance.
The result of a football game is influenced by many factors. The most basic is the strength gap between the teams, but it does not mean that other factors have no effect, such as home and away differences, weather, venues, etc., take the difference between home and away games as an example Many teams often show two different strengths at home and away, but it is wrong to blindly distinguish a team’s strength index into home and away games, because the strength of a team exists objectively, and home and away factors affect the team. The impact of the squadron is unknown. A certain team may fail to exert its strength and perform poorly in some away games due to various reasons, but it cannot be used to deny their true strength. For example, for example, a certain weightlifter, in usual It can lift 100 kilograms during training. Maybe it is impossible to lift this weight in an away game due to the fatigue of the boat and the spectator, but it cannot be denied that it can lift 100 kilograms. It can be foreseen. In the subsequent away games, the athletes also have a complete opportunity to lift the weight of 100 kilograms.
Therefore, it is obviously wrong to completely deny that he has the ability to lift 100 kilograms just because of the away game. According to statistics, in the result of football matches, the most common psychological upset is that certain teams that have previously underperformed in away games have shown the same strength in away games as at home, resulting in an underestimated result of the away team.
After combining the strength index with the home and away factors, we can draw a series of conclusions through long-term headcount data:
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