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I have a project which requires me to predict the injury time of a football match.

I have the relevant information, such as goals, corners, referee, 2 team names and the injury time for each half.

I tried to use Poisson regression and I am confused how I can include referee as a factor in my model? As different referees were involved in a different number of matches. Say Tom was involved in 200 games while Jerry was in 30 games.

I tried to add the factor "referee" into the model and the summary told me that only some of the referees have a significant effect on the results. So I wonder is it correct to add the referee into the model directly, and are there any other methods I can use?

Thanks!

waibibabo
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  • Hi waibibabo, since this is not really an R programming question but more a modelling/statistics question, I think you've got a better chance of getting a good answer at https://stats.stackexchange.com. Good luck! – Bas Aug 13 '20 at 20:07
  • @Bas Thanks for reminding me. I will go and check on that website! – waibibabo Aug 14 '20 at 10:01

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