Priscilla Bisognin

A Complete Guide to A/B Testing in Python: p-Values, Z-Tests, and Business Metrics

Oftentimes, when we compare two versions of a product, it’s difficult to tell whether the changes…
A/B Testing Explained: Metrics, Methods, and Why It Matters

A/B tests are designed to answer targeted business questions with evidence instead of guesswork. Once a…
A Practical Guide to Quantitative UX Research

When we talk about UX research, there are several methods we can use to understand how…
SQL-Driven Feature Adoption Study with Python Modeling and K-Means Segmentation

Imagine we are part of the Data team at a software company that released a new…
DELETE CASCADE vs Triggers: When to Use Each in Your Database

We’ve already talked about primary and foreign keys, the foundations of any relational database. Now it’s…
SQL JOIN: How to Combine Tables and Unlock Better Insights

Once you start working with real-world data, you quickly realize something important: no information lives alone.…
Introduction to SQL — The Language of Data

SQL (Structured Query Language) is the standard language used to interact with relational databases — systems…
Understanding Relational Databases: The Role of Primary and Foreign Keys

Relational databases organize information into tables—structured collections of rows and columns—where each row represents a record…
Understanding SVM: The Core Concepts Explained

Classification tasks are fundamental to machine learning because they address a wide range of real-world problems…
A Beginner’s Guide to Q-Learning – Pt. 2

In the last post, we explored the main concepts of the Q-Learning algorithm through a simple…