can you partition case and non case data for cross validation what is conditional cross validation? which type of data is subject to a cox model? when does crossvalidation work why sample from cases and non cases for cross validation can a cross validate model be independent how to use cross validation is it okay to sample separately for cross validation when analyzing cox model does a sampling can you sample from non cases for cross validation does a cox model have to be sampled separately why is it useful to cross validate a cox model for a patient why use crossvalidation can i sample from non cases in cross validation? which conditional sampling scheme is used to evaluate the predictive performance of a binary classification model? which type of data is used as a cross validation test why is crossvalidation sampling necessary what is cross-validation sampling can i separate cases and non cases for cross validation can a binary classification model use standardized data