Let's say there are 5 questions, and the answer to each one can be between -1 and 1.
Two people are answering these questions, so they each have a vector of their answers. Example:
[ -.3, 0, .95, -.94, .4 ]
[ .3, .7, .9, 1, -.3 ]
How do I find how similar they are in total? Probably as a single number representing their total answer similarity (-1 being complete opposite and 1 being the same?)
Is it just the dot product? Or is there another/better way?