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Why use nested validation when doing both hyper-parameter tuning and model selection?

I will post a slightly differently worded answer, to which I came after watching a lecture on generalization, reading a short chapter on generalization error in the book [1], and reading @Dikran ...
Ayrat's user avatar
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Why use nested validation when doing both hyper-parameter tuning and model selection?

FWIW, the paper cited in the article was written by Mrs Marsupial and I - I think there may be some subtleties that have been missed. Firstly, the purposes of the inner and outer cross-validation are ...
Dikran Marsupial's user avatar

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