r average kurtosis how to use gbm data in predicting why is the model different to the actual response gbm model how to test prediction why is an r model different from a gbm model which data set is better than set 3 gbm predictors how accurate what is the kurtosis of the predictive variable? what model is used to predict responses how to improve gbm model what is the kurtosis of the predictor what is gbm model what is the kurtosis value of gbm model how many sets of gbm does the prediction model have? what sets is the gbm model used in gbm model model how to test gbm models what is the range of predictors in set 2? why is the predictor value higher than the response value? can a model predict response