If you are within any school's GPA/LSAT average (25th to 75th percentile), you have a shot. If you are on the lower end of that average, you need to seriously bring it with your softs (personal statement, LOR, resume, transcripts, courses, work, diversity, etc.). A one point LSAT difference from the 25th percentile shouldn't be a strict cut off, but, again, means you have to bring it that much more else where in your application. Also, remember that there is no real statistical difference within any 3 point LSAT band. So, if a school's average is 161 and you have a 157 - you are basically there.