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In what order can i use replace missing value and normalization?

a_politoa_polito Member Posts: 3 Learner I
in Help
Hello! :) I'm trying to build a classification model with RF and  I have a data set with many missing values. I tried to use RF without replacing missing values but the performance is not good.  For this, I'd like to replace missing values with average. What is the better order to insert the operator? Before or after Normalization (z score) of data?

Thanks :)
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