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'Is a Premiership team's performance affected by the number of foreigners in the team'?

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Jack Mariner        --        Maths Statistics Coursework



'Is a Premiership team's performance affected by the number of foreigners in the team'?image07.png

By Jack Mariner


I am going to carry out an investigation into the amount of foreign players in the F.A Barclaycard Premiership.

I shall look at the 20 Premiership clubs and research about their players and performances in the last two seasons (including this season 01/02). So I will be looking at seasons 2000 to 2001 and 2001 to 2002.

After collecting and plotting the data on graphs and in tables, I will then analyse it to establish the bearing that foreigners do actually have on the teams' performances.

The second part of the investigation is to establish the trend of the amount of foreign players in Premiership teams. To do this I will compare the amounts of foreigners in season01/01 and season 01/02 and then analyse the data via Spearman's Rank Correlation.

I have chosen to investigate this topic because of my interest in football. I wanted to investigate something that I would enjoy doing and this appeared to be most appropriate. Another reason for choosing a football related piece was because the data could be easily attained from various sources.image07.png

I will refer to the seasons as 2000/2001 and 2001/2002 because these are the years that the seasons start and end in. This season, for example, started in august 2001 and finishes in May 2002. thus it is referred to as season 2001/2002.

Aim -

The aim of this investigation is to establish the relationship between the amount of foreign players in a team and the position that the team occupies in the league.

My criterion for a 'foreign' player is one with origins outside the United Kingdom (UK) and Republic Of Ireland (Rep.Ire).

...read more.


The data may not always be what I require

Advantage of collecting primary data

  • I can collect that data that I want
  • I know the accuracy of the results
  • I know have I have collected the data

Disadvantage of collecting primary data

  • It may take me a long time


Starting line-ups- I have chosen to do this investigation using the teams starting eleven players because I think this is the most appropriate method. I think this because each team has a different amount of players in their squad, but every team has eleven players in their starting line-up. This way is easiest and most of all it is the fairest method.image07.png

The eleven players that I have chosen to be in my starting line-ups are players that played the most games for the team. This is the fairest way because the players represent the teams. If I were to do the teams best eleven, regardless of the amount of matches a player has played, it would give a fair representation of the club when I come to analyse the data.

Positions-the positions of the teams that have chosen to take are the positions at the end of season 00/01 and the position of the team on the 18th of March 2002. I have chosen these dates because I feel they will give me very conclusive results. The amount of foreign players in a team is certainly increasing so to attain data with high amounts of foreigners would mean to choose dates that are as present as possible.

Analysing the data-

Analysing Graphs A and B

These graphs compare the amount of foreigners per team and the position that the team occupied in the form of scatter graphs.

...read more.



I conclude this investigation by stating that the amount of foreigners in a team's starting line up does have a bearing on the team's position in the league.

I also conclude that the amount of foreign player, playing in the Premiership is increasing.

This relationship between 'foreigners' and 'position' although present is not very strong. This is because of the fact that teams at the bottom of the league tend to buy foreign players that are not very good. This creates a whole different picture, giving very different results to what they might have been.


I have only included 17 out of 20 teams because three of the teams were only included in one of the two seasons. Each year three teams are relegated (moved down) into Division 1 and three teams are promoted into the Premiership from Division 1. So this is why I deemed it fair to include only 17 out of a possible 20 teams.

This radar graph shows the amount of foreigners per team. I have included this particular graph as I felt it was the most appropriate type for what I wanted to achieve. The graph shows how the amount of foreign players has generally increased between last season and this season. The area shows this. Straight away from looking at the graph you can establish that the area of the blue shape (season 2001/2002) is bigger then that of the green shape (season 2000/2001).


The line graph on the previous page also shows the amount of foreigners per team in season 2001/2002 and 2000/2001. This hand-drawn graph has been included because it clearly shows that the amount of foreign players per team in season 2001/2002 is greater than that in season 2000/2001. This is clearly established because the red line, representing season 2001/2002, is generally higher than the black line, representing season 2000/2001.image07.png

...read more.

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