How much can a mediocre interview hurt my chances?

<p>I'm applying as a transfer applicant, and my stats are fine but not really outstanding. I really wanted to get in though so when I heard that Rochester encourages interviewing I thought it would help my chances. Unfortunately, I got extremely nervous during the interview so I think I did terribly because I'm pretty sure some of my responses were incoherent ramblings. The interview was relatively short (like 15-20 minutes) and I'm relatively certain that I did not impress my interviewer at all. Can this interview hurt my chances?? Is there any way that I can interview again?</p>