William Chen

I am a Data Scientist at Quora, where I help grow and share the world's knowledge. I have a passion for storytelling with statistics and sharing my knowledge on Quora, where I write answers to help people interested in Data Science, Probability, Statistics, and more. I am a co-author of The Only Probability Cheatsheet You'll Ever Need and the Data Science Handbook.

Previously, I studied Statistics at Harvard, where I received both my Bachelors and my Masters Degree.

Some Things I've Worked On


Follow me on Quora to get updates when I post new answers about Data Science, Statistics, Probability, and Harvard.


My blog where I share tips, reviews, and advice on doing and winning escape rooms! Also check out my list of favorite San Francisco Bay Area Escape RoomsSeattle Escape RoomsLos Angeles Escape RoomsBoston Escape RoomsSan Jose Escape Rooms, and Escape Room Board Games. I've also compiled the most common Escape Room Puzzle Ideas.

The Data Science HandbooK

This book is Pay What You Want and contains interviews of 25 data scientists about their career, advice, and insights on becoming a data scientist.

Probability Cheatsheet

A Creative-Commons licensed 10-page probability cheatsheet that covers a full semester's worth of introductory probability, ideal for following along during a course or for review.

16 + Free Data Science Books

I compiled my list of my favorite quality data science books available for free, which covers such topics as statistical inference, visualization, and data mining.

How to Become a Data Scientist

Curated collection of free resources online to develop the skills to become a data scientist.