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I Built CausalLens — A Free, Open-Source Causal Impact Calculator for Time Series (5 Methods, Zero Setup)

I want to show you a tool I just open-sourced. It's called CausalLens, and it answers one specific question that most analytics stacks get completely …

pythonopensourcedatasciencestatistics
Dev.to May 30, 2026, 16:20 UTC
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Cointegration and Pairs Trading: When Time Series Move Together

Pairs trading rests on a simple idea: find two assets that move together, wait for them to diverge, and bet on convergence. The hard part is defining …

timeseriesquantfinancestatistics
Dev.to May 24, 2026, 10:32 UTC
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We built a mahjong dangerous-tile predictor calibrated on 4.97M real hands

The problem At a real mahjong table, software can't help you mid-hand. The question — "is this tile safe to discard?" — comes up every few turns, and …

iosmahjongstatisticsswift
Dev.to May 22, 2026, 23:04 UTC
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Understanding Correlation in PHP: Pearson vs Spearman vs Kendall Tau

Correlation helps you understand whether two variables move together and how strongly they are related. In this article, you'll learn how Pearson, Spe…

phpstatisticsopensourcetutorial
Dev.to May 19, 2026, 20:39 UTC
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The AI audit rep-curve: why 1 run gives you 67 percent reliability

For most of 2025, the standard AI-search audit I saw from peer agencies looked the same: run a list of prompts once each, screenshot the outputs, code…

aisearchauditmethodologystatisticsgeo
Dev.to May 12, 2026, 02:41 UTC
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Lending's Old Faithful: How a 1958 Breakthrough Still Holds Off the AI Rush

Series: Building an Explainable AI Underwriter This is Part 2 . ↜ Part 1: Why Explainable AI Matters in Underwriting ↝ Part 3: Human Intervention Thre…

datasciencemachinelearningstatistics
Dev.to May 9, 2026, 21:01 UTC

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