Randov Probability Calculator app for iPhone and iPad
4.6 (
6776 ratings )
Utilities
Education
Developer:
Max Buot
0.99 USD
Current version:
2.5.2, last update: 7 years ago
First release : 06 Feb 2009
App size: 465.6 Kb
Simple to use, Randov finds percentiles and cumulative probabilities for some common probability distributions: normal (Gaussian), Snedecors F, Students t, exponential, Poisson, binomial, and geometric. With this mobile application, you wont ever need to use a statistics textbook appendix, formula, or an expensive graphing calculator to find probabilities/p-values!
In the screenshot below, a z score calculation is shown: the mean and standard deviation are set to 0 and 1, respectively. The chance of a z-score less than 1.791 (input value) equals 0.963 (output value). Also, The z-score corresponding to a cumulative probability of 0.348 (input value) equals -0.391 (output value).
In addition, two random number generators (discrete and continuous) are included.
Pros and cons of Randov Probability Calculator app for iPhone and iPad
Randov Probability Calculator app good for
The interface is perfect and the app is priced very reasonably. But, I would like to see some additional distributions included. In particular, it would be nice to see the Gamma, Inverse Gamma, inverse exponential, Negative Binomial and bivariate normal Distribution Also, raw and central moments would also be nice.
Keep up the good work.
Useful, I would love it if it had a list of equations, and a list of variables and what they mean...
A help screen would be nice though but other than that this is nice.
If you could increase the range of the probabilities (to extend beyond 3 sigma or so) perhaps using scientific notation, that would be awesome. Otherwise, nice app.
Thanks to an attentive developer. Nice work. Still examining all the functions.
I teach statistics and econometrics and frequently need a p-value calculator in the classroom. Ive been waiting for one that generates p-values for a variety of commonly used distributions. Randov does exactly that, and is beautifully laid out as well. Kudos to the developer for creating a very useful app with great aesthetics and a simple user interface.
Some bad moments
Very little info on different functions.
Doesnt support iPhone 5 or later screen ratios.
Paid money for this app and it does not work at all! Complete waste! I am taking a college level statistics course and thought this calculator would help, I was very wrong.
