ML Gyaan

RAG Demystified Part 1: Why Your AI Doesn't Know Your Business (And How to Fix It)

by Vishnu Vansh · 17 min read · December 14, 2025

You just spent $50,000 training a custom AI model. It hallucinates. Confidently. Completely wrong. Welcome to the expensive reality of AI in 2025—and the better way forward.

Prompt Engineering Demystified: From Zero to Hero

by Vishnu Vansh · 10 min read · December 12, 2025

You know that feeling when you ask ChatGPT something and get back a response that's... technically correct but completely useless? Welcome to the world where how you ask matters just as much as what you ask.

Metrics that Matter: Beyond Accuracy

by Vishnu Vansh · 6 min read · July 21, 2025

From accuracy traps to fairness and security, a definitive guide to ML metrics with real-world cases and equations.

A/B Testing Demystified - Part 2: Beyond the Basics

by Vishnu Vansh · 5 min read · July 2, 2025

Explore advanced A/B testing - power, sample size, Bayesian methods, SRM checks, and real-world pitfalls.

A/B Testing Demystified...Part 1: The Science of Fair Comparisons

by Vishnu Vansh · 8 min read · June 21, 2025

Behind every A/B test is a courtroom trial of statistics. Let's explore how hypotheses, errors, and sample size shape the truth

Sips and Stats: Seattle’s Best Coffee Spots Revealed

by Vishnu Vansh · 5 min read · June 18, 2025

We used real-time data, machine learning, and a touch of caffeine science to explore and reveal the best coffee spots in Seattle.

The Art of Asking Good Questions

by Vishnu Vansh · 5 min read · April 23, 2025

Asking the right questions is an essential skill in data science.

Mean, Median, Mode: The Three Musketeers of Misleading Stats

by Vishnu Vansh · 4 min read · April 18, 2025

Everyone lies with statistics. Here's how to catch them in the act — a fun guide to understanding when averages mislead.

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