should test and train datasets be of the same variance which test dataset should it be shared? should test and train datasets have similar variance why do tests have variance when a train and test dataset have similar variance should it be split should you test and train the same data should the variance of a test dataset be similar to that of a train dataset? do tests and tests have similar variance should you use the variance of a test and a train dataset should a dataset have similar variance? should a test and a train dataset have similar variances? what is variance test and train datasets should a train dataset have similar variance do test and test data have variance does test and test datasets have the same variance? should a train dataset and a test dataset have the same variance? what is the relationship between test and train dataset? should test and train datasets have similar variance? quizlet why would you split the data in a test and a train data can we split data between test and train