when should i select a random variable when in trial and error? when do i decide to remove a variable? which model should be used for predictive variable selection? what is a predictive variable selection which method is the best for predicting variable selection? why is a variable selection algorithm important what type of model is best for predicting variables why should i remove or not add a variable what are the best models for predicting variable selection why do we do the best selection with less variable does predicting variables always work? when to select variable when to remove variable for a time series model when shall i choose to remove the variable why add a variable to a model why use predictive variable selection when should the swa variable be removed predictable variables selection why is the most parsimonious model a good model? when do you select variables when using trial and error