Ambigious about the acceptance - (Apr/09/2013 )

Hello,

So, i got through my PhD interview. But the professor said he is 95% sure/interested in hiring me? He has two more interviews to take and he will let me know after that.

I was wondering what does 95% mean as in how sure is he or how interested is he.

http://en.wikipedia.org/wiki/Percentage

Thanks for the link Trof
People are more experienced here with interviews and stuff so was wondering what does the prof. meant by saying 95%