what is the k-fold validation is k-fold cross validation better what are the k-fold validation methods which algorithm should be used for training and testing why do researchers use k times hold out validation what is k fold validate which is the preferred method of k-fold cross validation what is the difference between k times hold out validation and k times crossover validation? what is k-fold validation why use k+s holdouts what is the difference of k-fold validation vs. hold-out validation? what's the difference between k times hold-out and k times training which is better, k times holdout or cross validation why use k x validation what is k-fold cross validation which is preferable to x times the hold out method when training when to do k times hold out validation why use k-fold validation which is preferable for cross validation of a genetic model? why is k-fold validation preferable