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Regression and Path Analysis: What the Diagram Does Not Tell You
Path analysis is a system of linked regression equations. It can decompose associations into direct and indirect paths, but causal interpretation still depen...
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Ethics in Data Science
Ethics in data science is a question of governance, measurement, rights, incentives, and accountability, not a checklist added after a model is built.
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Applying R Functions on Rolling Windows with runner
A practical guide to rolling computations in R with runner, including fixed-size and time-indexed windows, lags, custom evaluation points, grouped data, and ...
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MANOVA vs. ANOVA: What Changes When Outcomes Are Multivariate?
ANOVA and MANOVA answer different questions. MANOVA tests group differences in a vector of outcomes and requires careful attention to covariance structure, e...
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The Life and Mathematics of Paul Erdős
Paul Erdős transformed twentieth-century combinatorics, number theory, graph theory, and probabilistic mathematics through an unusually collaborative style o...
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The Vulnerability of Large Language Models to the Closure of Open-Source Data Platforms
An in-depth exploration of how the closure of open-source data platforms threatens the growth of Large Language Models and the vital role humans play in this...
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Demystifying Data Science
Data science is not a catalogue of algorithms. It is a discipline for turning imperfect observations into defensible descriptions, predictions, and decisions...
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Exploring Shared Nearest Neighbors (SNN) for Outlier Detection
SNN is a distance metric that enhances traditional methods like k Nearest Neighbors, especially in high-dimensional, variable-density datasets.
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Gaussian Processes for Time-Series Analysis in Python
Dive into Gaussian Processes for time-series analysis using Python, combining flexible modeling with Bayesian inference for trends, seasonality, and noise.
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Customer Lifetime Value: A Statistical and Decision-Theoretic View
Customer Lifetime Value is the expected present value of future customer contribution, not simply historical revenue or median tenure times average monthly c...
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