I think of ACT as Actors Contemporary Theater out of San Francisco. I wish a2k posters would explain acronyms, as we post from around the world here.
But, to look up a test called ACT -
from actstudent.org, close to the top if you google ACT, you'll see this about scores -
http://www.actstudent.org/scores/understand/index.html
re the national ranks -
http://www.actstudent.org/scores/understand/index.html#ranks
what that means to you re a given school, I don't know. Perhaps you can google re that school + ACT test score
I'm doubtful the test score is the whole basis of admission, but I could be wrong.