I rang up UAC and they said that RET is your percentile out of all those that sat the STAT for UWS. (I'm guessing just that year - not sure????)
The STAT is a percentile standardised nationwide and across years (it says this on the form). So the 98.8 would be the multiple choice part I assume, what mark did you get, I got 174. The RET also takes into consideration the written part. Donshe, luckily for us pharmacy and vet. science only look at you multi choice results!
I'm not sure about the mature age entry - it's in the UAC guide though.
To Tennille, I didn't mean that 94 was the average I just thought it was taken from the average of the multi choice and written parts (98.5 and 89, so about 94), I was mistaken because the percentiles are from a different population...