MATLAB is really good for Math/Stats. I just finished up a Probabilistic Learning Models course and all we used was MATLAB. I'm sure there's a lot of free online tutorials although I've never tried one. Maybe someone else on here can recommend a book you could get too.
Here's one tutorial from the company that makes MATLAB:
http://www.mathworks.com/academia/st...launchpad.html
Here's a guy recommending just to use the demos within MATLAB:
http://programmers.stackexchange.com...o-learn-matlab