Some simple probability distibutions missing

themadmathematician shared this idea 2 years ago
Under Consideration

I was going to illustrate a simple problem about probability distributions for dice and I realised that the Probability calculator was missing some simple distributions, namely the discrete and continous uniform distributions. Agreed, these are simple to calculate by hand, but they provide a link between the simple cases where you don't talk about distributions and the more difficult cases where you do talk about them.


But then I started to think. How do I display the distribution which occurs when you roll two dice? This is a very common case in school education but I don't think you can show it in GeoGebra, except as a binomial distibution with probability 1/6 and 5/6. There is no way to display all cases (all sums).


So as an added bonus, I'd also like to see what might be called "multiple discrete uniform distribution" implemented, i.e. the ability to see the distribution of a number of equal dice (or spinners, coins etc) with a selectable number of options (number of sides on dice, or fields in spinner).


Mathematically these are not difficult to calculate and the list of distributions is not so long that it cannot hold another two or three entries that are actually used in middle school. If the lists are considered to be too long anyway I then suggest it is split in a discrete list and a continous list with a new radio button to select between them.

© 2019 International GeoGebra Institute