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Which outlier detection should I use?
Some of the stores' sales have been entered wrong or some other reasons are outliers. But I don't know how many.
So before I run any other analysis (such as correlation), I need to run an outlier detection.
For other software or tools, I normally use box/whisker plot to find the acceptable range of the value and then use filter.
Since RM has outlier operators, I want to use one of them. But I am not sure which one should I use in this case.
And it feels like running process with outlier detection takes very long time, is that right? Or I did something wrong...