Hello everyone,


If there are two columns, one is age (numeric, cut to several groups), the 
other is hair color type(factor: yellow, black, white). 



If the age column is not normal distributed, which statistic method should use 
to prove the trend relationship between them, for example, the older has more 
probability of white hair type? Are there any existed R package to figure out 
this situation?



Thank you.




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