Maturing Conversions in AB-experiment

Why you need to be patient and when cohort-wise approach is a flaw

August 20, 2024 · 18 min · Nikita Podlozhniy

Delta Method for Ratio Metrics in AB Testing

Correct variance estimation for ratio metrics using the Delta Method — and why naive approaches quietly break your confidence intervals

July 31, 2024 · 6 min · Nikita Podlozhniy

Dunnett's Correction for ABC testing

Improve your multivariate testing framework power and roll out the experiments much faster

July 28, 2024 · 15 min · Nikita Podlozhniy

CUPED: Reducing Metric Variance with Pre-Experiment Data

How CUPED uses pre-experiment covariates to cut metric variance and boost AB test sensitivity — with a rigorous proof of what works and what silently breaks

April 18, 2024 · 7 min · Nikita Podlozhniy

Customer Feedback Analysis in Python

Background Every company has always taken pride in providing excellent customer service, therefore it’s crucial as part of ongoing improvements for product to collect and analyse feedback after each customer interaction on support channels A top-notch analyst in Hi-Tech industry should be in capable of handle at least base feedback analysis quickly and efficiently and going through this article you will be introduced with the necessary concepts and eventually given the base guide on how to unlock the true power of text data ...

October 29, 2023 · 17 min · Nikita Podlozhniy