Probability Distributions

1.85K reviews
Content rating
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About this app

Compute probabilities and plot the probability mass function for the binomial, geometric, Poisson, hypergeometric, and negative binomial distributions. Compute probabilities, determine percentiles, and plot the probability density function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, and log-normal distributions.

Some knowledge of probability distributions is required! If you don't know what a "binomial" distribution is, for example, this application will not be useful to you.
Updated on
Nov 10, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

1.74K reviews
A Google user
November 20, 2018
OUTSTANDING app. Both useful and informative. Clean interface takes you to where you need to go immediately. Besides performing the distribution calculations, the app provides formulas and other relevant information about each distribution succinctly. Thank you for providing this app free of charge and without any ads.
78 people found this review helpful
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Natalia Toporikova
September 3, 2020
I teach statistic class and cannot imagine doing it without this app. So easy and intuitive for students to use. Visuals are really help to understand statistical concepts. Thanks for beautiful and reliable app
25 people found this review helpful
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Matthew Bognar
September 3, 2020
Thank you!
A Google user
December 29, 2019
Works, does the thing I needed it to do. Every time I use the hypergeometric and click on the screen it clears x. I would be more than happy to rate 5 stars if it wasn't for this little problem.
27 people found this review helpful
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Matthew Bognar
December 30, 2019
If a parameter (n, N, or M) is changed, the app automatically clears the x value. The app does this to avoid possible conflicts with x values outside of the support.

What's new

Small bug fixes and performance enhancements.