Probability implementation using Matlab or SPSS

Hello

I need to implement the working that are in the attachment, the problem being is that i don't even know where to start, I have available MatLab or SPSS and can generate the reuslts in a text file for use with one of these programs.

The problem is that i have 8 measurements of keystroke timings and need to determine whether or not the new sample is fromthe same person.....

If you read the document on the attachment then i'm sure it will make it clearer..

how would it be best to implement this?

cheers in advance, if you read the doc then i can answer questions easier..

cheers

Andy