Paul Hirschi
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PORTFOLIO / 2026

I build models that turn noisy data into decisions.

Data scientist working across applied mathematics and statistics — research, open-source tooling, and production systems that hold up under scrutiny.

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3.3σ 3.6σ 5.8σ feature 2 feature 1 inlier anomaly fig — robust outlier detection 5 / 64 flagged
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Experimentation · Tool · Bayesian methods

Positive Predictive Values

A small webapp that let's you play with base rates, true positive, and false positive results to see how the math of Bayes Theorem corrects for the Base Rate Fallacy and our broken intuition around conditional probabilities.

PythonMarimo
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Portfolio project · 2026 Quantified Risk
Modeling the Customer Lifecycle: One Dataset, Five Questions
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Paul Hirschi — data science · applied mathematics · statistics

 
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