Germany Bundesliga

yellow card

How a lot do fouls have an effect on successful? That is an age-old query in all sports activities. Ought to groups play a much less bodily aggressive model to have a greater likelihood of successful, or ought to they even take into account fouls an element? This evaluation aimed to find out how a lot of an element yellow playing cards performed in professional soccer wins in leagues internationally. The research regarded on the high 5 soccer leagues for the previous decade to see if there was a damaging correlation between yellow playing cards and wins. I ran the identical correlation check in R for each season of the 5 leagues prior to now decade to get a correlation coefficient and a P-value. This correlation coefficient conveys how a lot of a optimistic or damaging correlation there’s between the 2 chosen variables (yellow playing cards and wins). The dimensions of the P-value signifies whether or not or not the null speculation might be rejected or not. A null speculation postulates that the 2 variables don’t have any impact on one another in any respect. To reject the null speculation, we should have a P-value decrease than 0.05, which is customary when testing for correlation. Every graph under represents one season for a specific league. The info factors on the graphs symbolize the league’s groups and their placement relies on their respective variety of wins and yellow playing cards. I’ll spotlight each graph in pink for every season with a damaging correlation coefficient decrease than -0.5 and a P-value smaller than 0.05 to indicate which seasons show a robust damaging correlation between wins and yellow playing cards. With that data in thoughts, let’s dive into the outcomes of the assessments.

Germany Bundesliga

Bundesliga 2012-13

Bundesliga 2013-14

Bundesliga 2014-15

Bundesliga 2015-16

Bundesliga 2016-17

Bundesliga 2017-28

Bundesliga 2018-19

Bundesliga 2019-20

Bundesliga 2020-21

Bundesliga 2021-22


From the outcomes of my testing, I noticed that the Germany Bundesliga had a complete of seven out of the ten seasons that confirmed each a decently robust damaging correlation coefficient and a P-value lower than 0.05. Nevertheless, their final season confirmed the weakest of all correlations of the previous decade regardless of the earlier three seasons exhibiting indicators of correlations. The truth that seven out of the ten seasons show a sturdy damaging correlation suggests yellow playing cards as being an vital think about figuring out if a workforce will lose or not within the Bundesliga.


EFL 2012-13

EFL 2013-14

EFL 2014-15

EFL 2015-16

EFL 2016-17

EFL 2017-18

EFL 2018-19

EFL 2019-20

EFL 2020-21

EFL 2021-22

In distinction to the Germany Bundesliga information, there wasn’t a single season within the English Soccer League (EFL) that confirmed a robust damaging correlation between yellow playing cards and wins. As an alternative, there was a optimistic correlation between the 2 variables on a number of graphs. The graphs that had a optimistic correlation nonetheless didn’t have a correlation coefficient of over 0.5 or a P worth lower than 0.05, which signifies that the outcomes don’t show any vital optimistic correlation between the 2 variables both. The primary takeaway from our outcomes from the EFL is that yellow playing cards have had little to no influence on successful prior to now decade.


EPL 2012-13

EPL 2013-14

EPL 2014-15

EPL 2015-16

EPL 2016-17

EPL 2017-18

EPL 2018-19

EPL 2019-20

EPL 2020-21

EPL 2021-22


The England Premier League (EPL) outcomes didn’t present the strongest damaging correlation however did present greater than the EFL. Just one season met the requirements to indicate a robust damaging correlation with a correlation coefficient of -0.54 and a P-value of 0.013 within the 2018/2019 season. Two different seasons met the P-value {qualifications} however didn’t have a robust sufficient correlation coefficient to match the {qualifications} for a robust damaging correlation. All of the seasons confirmed a damaging correlation, however not rising to a degree of significance. That is totally different from what was noticed within the EFL, the place no constant relationship was demonstrated. Nevertheless, the outcomes weren’t robust sufficient to indicate that yellow playing cards have a major influence on successful within the EPL, with just one season out of ten exhibiting a robust damaging correlation.

La Liga

La Liga 2012-13

La Liga 2013-14

La Liga 2014-15

La Liga 2015-16

La Liga 2016-17

La Liga 2017-18

La Liga 2018-19

La Liga 2019-20

La Liga 2020-21

La Liga 2021-22



La Liga confirmed a decently excessive variety of robust damaging correlation seasons, with 4 out of ten seasons assembly the {qualifications} for the robust damaging correlation. Two different seasons are on the verge of assembly the {qualifications} for a robust damaging correlation.  The {qualifications} for a robust damaging correlation for these two seasons have been partially met, with P-values beneath .05 in seasons 2014/2015 and 2021/2022. The one qualification that wasn’t met was the correlation coefficient with correlation coefficients of -0.45 and -0.48. If these two seasons had a barely stronger damaging correlation, six out of the ten seasons would present a robust damaging correlation slightly than 4. Once more, there was a damaging relationship slope in every of the seasons for this league, indicating that fouls do play a think about successful in La Liga, however solely assembly significance standards in 4 of the ten seasons.

Serie A

Serie A 2012-13

Serie A 2013-14

Serie A 2014-15

Serie A 2015-16

Serie A 2016-17

Serie A 2017-18

Serie A 2018-19

Serie A 2019-20

Serie A 2020-21

Serie A 2021-22



The final league I checked out was Serie A. Serie A is tied for probably the most seasons exhibiting a robust damaging correlation, with seven out of the ten seasons exhibiting a major correlation. Regardless of two of the ultimate three seasons not exhibiting a robust damaging correlation, that pattern ended with the 2021/2022 season. The {qualifications} for the 2021/2022 season have been met, demonstrating a robust damaging correlation between yellow playing cards and wins, with a correlation coefficient of -0.51 and a P-value of 0.0216. Total this league had a majority of seasons from the previous decade exhibiting a robust damaging correlation, so extra yellow playing cards might undoubtedly be thought of a robust think about fewer wins in Serie A.



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