Every school interviews a different number of applicants. So it is hard to say what the acceptance rate after an interview is. I know some schools only interview 90 students for 42 spots. Some schools interview a couple hundred. Also interviews are different for each school. Some schools don't interview, some have essays as part and some don't. They are just trying to find which students match up with the program best.
Ive interviewed with programs that if not accepted everyone that interviewed becomes an alternate and other schools even though you interviewed you may be rejected.
It really depends on the program so maybe just be specific with which program you are asking
