Replace your statistical tables with an interactive, graphical probability distributions calculator
Compute probabilities, determine percentiles, and plot the probability density function for the normal (Gaussian), t, chi-square, F, exponential, gamma, beta, log-normal, and Uniform distributions.
Compute probabilities, approximate percentiles, and plot the probability mass function for the binomial, geometric (2 versions), hypergeometric, Poisson, and negative binomial (2 versions) distributions.
This could be really useful for students in college stats courses who are on a budget and can’t afford to buy a $100+ dollar graphing calculator. It does basic advanced functions like binomial pdf - for free. I don’t know if it does invNorm or Z-Test calculations ( possibly not) but for a calculation app that you don’t have to pay for this is pretty great and was just what I was looking for.
Super handy tool and reference
jmormay
I’m a grad student and this has been a huge help for my stats class. It makes it easy to calculate probabilities using any distribution that I have needed. It got even better when I discovered that the app has easy links to formulas to calculate mean and variance for each distribution.
So handy
Kiersten D
I had Bognar as a professor multiple times in college and his app always came in handy. Whether on homework or studying for actuary exams, it’s always nice to have an app that can quickly compute values, in addition to showing graphs that help visualize data.
Nice exploratory tool
Mxba99
Doesn’t try to do a lot, but what it does it does very well. Thank you for this app.(Future feature request, if you have time: Allow setting plot boundaries. e.g. for Beta, it’s sometimes illuminating to set the x bounds to (0,1).)
Probability Distributions has been completely re-written for better stability, error checking, and graphics. It maintains the easy-to-use interface of the old version while being more attractive and responsive. App maintenance will be much more straightforward.
Version 6.0.0
The developer, Matthew Bognar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
