Evaluating a model honestly: validate, measure and explain

A model is worth what it gets right on data it has not seen, measured with the metric that fits the decision and compared against something. That is exactly what is usually missing from the result a copilot hands you: a lone percentage arrives, with no exam to back it up, no rival and no fine print. This course teaches you to ask for those three things, to read them and to sign off on what comes out.