Category: Data & analytics
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Estimating home court advantage in Lithuanian Basketball League with Gaussian Processes
I was looking for an excuse to play around with Gaussian Processes in a Bayesian Inference setting, and decided to revisit an older project about basketball in Lithuania. Just in time for this year’s finals!
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Modeling tenure effects the Bayesian way
After learning new things in Statistical Rethinking class, I took on to play around with an age-period-cohort-like model for disentangling tenure effects from seasonality & other factors. The Bayesian way.
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Getting faster to decisions in A/B tests – part 2: misinterpretations and practical challenges of classical hypothesis testing
Null hypothesis test of means is the most basic statistical procedure used in A/B testing. But the concepts built into it are not exactly intuitive. I go through 5 practical issues that anyone working with experimentation in business should be aware of.
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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,…
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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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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.
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An interactive introduction to wavelets and discrete wavelet transformation for data scientists
I built a practical intro guide to wavelets and discrete wavelet transformation for data scientists. Welcome to magic!
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Interpretation of log transformations in linear models: just how accurate is it?
Log-transformations and their interpretation as percentage impact is taught in every introductory regression class. But are most people aware that there is a hidden approximation behind the percentage-based intuition? One that may not be appropriate in some cases?
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From an Excel schedule to Outlook Calendar with PowerShell
A quick post about using PowerShell to create .ics files (and then afterwards combining them into a master calendar file). Turns out PowerShell is really quite pleasant to work with!