Probability Distributions

4.6
634 reviews
100K+
Downloads
Content rating
Everyone
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About this app

Continuous probability distributions:
- Normal (Gaussian)
- t (Student's t)
- Chi-Squared
- F
- Exponential
- Gamma
- Beta
- Log-normal
- Weibull
- Uniform

Discrete probability distributions:
- Binomial
- Poisson
- Pascal (Negative Binomial)
- Geometric
- Hypergeometric
- Discrete Uniform

You can now calculate confidence intervals for "Both", "Middle", "Lower" and "Upper" tails. For example, if you want to find the 95% confidence interval of a Normal Distribution:
1. first select "Normal" distribution and select "Middle"
2. then enter "0.95" on the right side of the probability values
3. From and to values will be automatically calculated for you (-1.96, 1.96 in this case)

Help test the beta version of iOS app https://testflight.apple.com/join/eC4zBt6z

If you like the app, your review ❤️ and 5-⭐s are highly appreciated. Thank you!
Updated on
Jan 22, 2024

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

4.6
606 reviews
letsb3nameless
October 4, 2022
Useful since I dont have a graphics calculator, however it isn't super user friendly (no text wrapping for answers, answer goes offscreen for "both tails" mode). I'm just glad there arent that many invNorm or normalCDF questions to study. Overall pretty useful anyway, made my life easier.
7 people found this review helpful
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Madiyar Aitbayev
October 5, 2022
Updated: Hi, thanks for the review. Please update to the latest version of the app where this should be fixed.
A google user
February 17, 2024
it would be better if the app remembers last entered values and opens with them
2 people found this review helpful
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rookitchen
March 4, 2024
there are forcing stat students to buy the ti 84 for 110 bucks just to do half the operations this app does.
2 people found this review helpful
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What's new

The user interface was flipped from right to left when the system language is a right to left language. This release prevents flipping since the app only supports English language.