Stats demo

Welcome to Stats Demo. This is a Github site that provides some demonstrations of statistics. The author is Hoang Bao Long, MD MPH—a medical doctor, epidemiologist, and a lecturer at VinUniversity, Hanoi, Vietnam. Visit his personal website for more information.

Last updated: August 2025.

List of demos

Random error

… and sampling distribution

This demo visualizes the concept of random error and sampling distribution. It generates random numbers from a normal distribution and plots the histogram.

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Diagnostic accuracy

(Se, Sp, PPV, NPV)

This demo allows you to see how diagnostic accuracy measures change under different conditions.

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Confounding

(one of the three bias groups)

This demo visualizes how confounding bias affects the exposure-outcome association.

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