Hi, To clarify, the line graphs on that chart are on a secondary axis, the zero line there represents the 0 of that secondary axis. The idea here is to see the corelation between the coeficients and the target rate on the individual categories, overlayed with the frequency of a category. (often the size of the bucket explains small inconsistencies in the corelation mentioned above). Theoretically I could look at the data seperatly, i suppose that is a solution, but i would try to place them next to each other so I can overlay them in my head, so that seems sub-optimal.
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