Lucas Braga

A/B Testing, Reject Inference, and How to Get the Right Sample Size for Your Experiments Lucas Braga · Follow Published in Towards Data Science · 17 min read · 9 hours ago — Image created by the author There are different statistical formulas for different scenarios. The first question to ask is: are you comparing two groups, such as in an A/B test, or are you selecting a sample from a population that is large

A study case of credit card fraud Lucas Braga · Follow Published in Towards Data Science · 7 min read · 10 hours ago — 1. Introduction2. How does a model make predictions3. Confusion Matrix4. Metrics to Evaluate Model Performance5. When to use what metrics 1. Introduction Once we trained a supervised machine learning model to solve a classification problem, we’d be happy if this was the end of our work, and we could just