Mostly geeking about about all things data
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Getting to decisions faster in A/B tests – part 1: literature review
I set out on a journey to learn what statistical approaches the industry uses to get to faster decisions in A/B testing. This is the first post in the series in which I set the scene and summarize outcomes of my “literature review”.
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A/B testing, zero-inflated (truncated) distributions and power
Naive A/B testing just uses t-tests or proportion tests, with the assumption that at large sample sizes, the right statistical test does not matter that much. I explore the case of a zero-inflated upper-bounded Poisson distribution and find that using the wrong test can require 3x the sample size to achieve the same statistical power, a difference large enough to matter in a real business setting.
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The Jungle of Metrics Layers and its Invisible Elephant
Metrics layer is the rising “missing component” of the modern data stack. I dive into functionalities provided by 10 prominent players in the space and contrast them with a player no one talks about: Microsoft Power BI.
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Grappling with privilege
Realizing you’re privileged is uncomfortable. It’s like understanding you can have a cake and eat it, too, except you never asked for the damn cake and you now realize most people aren’t as lucky as you are.
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Gaussian Processes: a versatile data science method that packs infinite dimensions
Last semester, I learned about Gaussian Processes. They seemed really intriguing at the first glance, and it turned out they are even more intriguing as you dig deeper. This post is an application-oriented intro to Gaussian Processes. I’ll cover GP regressions, forecasting for time series and usage of GPs in bayesian optimization among other things.