how to select models which features are selected when cross checking why does the use of cross validation work for predictive analysis? when to use cross validation to estimate model performance what is the purpose of cross validation? when does the model selection occur what features of a model do you need to estimate their out of sample performance? does data analysis use cross validation? what is the role of the model based on cross validation what is the purpose of each cross validation fold how to estimate the expected out of sample performance in a model? when evaluating model performance using cross validation, the following factors are referred to as _______________________________. what is the importance of cross validation and model selection how to estimate out of sample model do features have a tendency to be used in cross validation? what is the purpose of the cross validation procedure? what is the purpose of each feature selection quizlet can crossvalidation estimates model performance why use a cross validation model to select a feature how does cross validation work