Data Science, Machine Learning, Extrapolation, Regression, IBM.
1) The violin plot images are fitting a distribution to the data, making it appear as if there is some overlap between the training/testing data and the extrapolation data. Note that these two sets are completely disjoint, and all values are ≥ 0. References Bartley, M. L., Hanks, E. M., Schliep, E.