why use r for data analysis how to train a linear model using r what would be appropriate action during training a model which approach is best for train test split with a small data set what would be an alternative to a train test split what to do when constructing a train test model which is appropriate to develop a small model? what is t test in r when should r split data how can you train a model using a small data set can you split the data with a large set of explanatory variables what is a cross validation technique with a small data set? what is the alternative to a train test split when developing a linear model which method to use to test a small model how to train and test a linear model why use r when building a model what is the correct approach to test for predictability with a small data set? what would the best approach to use when attempting to train the models how to train a model with a data set how many variables in a large data set