209. Looking at AB-test performance in time

We come close to the holy grail question of AB-testing. 🏆

The question is this: How confident are we in the uplift reported by our analysis? 🤔

Indeed, we have a coin and we need to determine if it’s a fair coin or not (a fair coin has 50/50 chance of getting heads or tails). After throwing the coin 3 times we have 2 tails and 1 head. Our analysis shows us a 66.67% rate of tails which is a HUGE indicator that the coin isn’t fair. We had only 3 observations, can we trust the result of this analysis?

When analyzing AB-testing results we could have...

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Anatoli Makarevich, author of SQL Habit About SQL Habit

Hi, it’s Anatoli, the author of SQL Habit. 👋

SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst 📊 and solve real-life challenges from Business, Marketing, and Product Management.

SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work. 🚀

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