Machine learning: How to determine the right modelling targets

This is the last blogpost of this series. We've already talked about conceptual model targets and model performance targets, now it is time to discuss the importance of data in building and evaluating models. More specifically, we will talk about three things: data quality, splitting data for evaluation, and sampling. Before we jump in, let me remind you that in the context of today's post, a model refers to a decision-generating process that applies logical or statistical techniques to transform the data it is provided into a meaningful output. I'll start with the obvious: good data quality is the foundation for producing accurate (and useful) findings from modelling.