I am trying to fit some data that looks like a bell-curve: we reach a maximum at some value close to the mean, then the graph falls towards zero as we get further away from it. I am not the "owner" of the data so I cannot share it with you here, but I think the idea is clear with the "fake data" below
I would like to find a non-linear model that can fit that type of data, but my search did not give me much information. What are your suggestions?
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Best Answer
If your goal is to just describe the pattern, you could try a GAMM i.e. generalized additive mixed model. Choose the residual distribution to reflect the zero bound and any other data properties you may be aware of.
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