Machine Learning 101: The What, Why, and How of Weighting - KDnuggets

One thing I get asked about a lot is weighting. What do I need to worry about? By popular demand, I recently put together a lunch-and-learn at my company to help address all these questions. The goal was to be applicable to a large audience, (e.g., with a gentle introduction), but also some good technical advice/details to help practitioners. This blog was adapted from that presentation. Before we talk about weighting, we should all get on the same page about what a model is, what they are used for, and some of the common issues that modelers run into.