Train,dev set

[Akshay_Sunkara]

why professor said we need train set,dev set for model building but test set is not mandatory?I didn’t get it isn’t crossvalidation set(dev set) and test set not similar?

[Deepti_Prasad]

cross validation dataset is evaluated if your training dataset is good enough with your model creation where as test set checks/evaluate a model after a model has been trained with cv datasets.

You can also refer to some of the similar query or doubts asked previously by learner

Model Selection based on CV or Test & Diff b/w CV and Test data

That is a good question and I know most of the time, this is the confusion comes related to cross validation and test dataset. But if you are thinking both data are used only to get the prediction, then this is a bit incomplete understanding. Cross validation data is basically used to check how really good is your model in relation to training data where as test data usually check how the model would perform which has been trained on a cv data. CV data gives unbiased evaluation of the model’s…