As per
egmat ,the conversion rate for Anderson for scores above 740 is 6%. It is higher for other schools above Anderson. The way I see it, your application must be a good one since you received an invite from UCLA,but you might not have been able to represent your profile during your interview. The big reason for that I can see is your very high GMAT score. The school might believe that Anderson is not your first choice
and hence the waitlist. I would weigh your chances based on your answers in the interview. Your profile has little to do with your acceptance post interview
I agree with you and my interview also went well but I wrote my toefl in hurry when they asked me to provide a toefl score asap and ended up getting 86. I strongly feel that is the reason for being in the waitlist.