... Seeing an recent review paper on cross validation from [arXiv] which describes basic notions in theoretical statistics, I couldn?t resist mentioning it here. Cross validation has been used in various statistical fields such as classification, density estimation, model selection, regression, to name a few. [arXiv:math.ST:0907.4728] . A survey of cross validation procedures for model selection by Sylvain Arlot . ... Tags: ADS , cross-validation , machine learning , Model Selection , n-fold . ...