Can someone PLEASE explain to me how I got such a low UAI? (1 Viewer)

[u-borat]

+1

 

[tommykins]

123

 

[Scissors]

same.

 

[Peteage]

I agree that this seems a bit suspicious.

Even with very conservative estimates of your scaled marks, I calculated a UAI in the low 60s. I used the 2008 statistics.

I'm currently working on a new version of SAM so I will investigate this further in a couple of days.

Are you hoping for an offer in the main round on 21 Jan 2009?

You could also try calling the UAI Enquiry Centre - (02) 8736 5900. It's only open for today and tomorrow, 8.30 am to 4.30 pm. There is a very small chance they might look into it for you as well.

I didn't believe you so I added his scaled aggregates. I worked out approximately 269 (being a little generous) which would have given a uai of about mid 60s.

 

[kevinx2]

mebbe he's a very subtle troll

 

[dp624]

I didn't believe you so I added his scaled aggregates. I worked out approximately 269 (being a little generous) which would have given a uai of about mid 60s.

lol you don;t believe him hahaha

 

[Jusskah]

Lazarus is a pretty shady guy, afterall

 

[TBK11]

hmm im a lil confused can some1 explain this to me lest say for example Chemistry

what exactly does that mean?? HSC and Scaled

 

[Peteage]

hmm im a lil confused can some1 explain this to me lest say for example Chemistry

what exactly does that mean?? HSC and Scaled

Use this table to determine your scaled aggregates. They are given per unit so for chemistry you will need to double the HSC and scaled marks since it is a two unit subject. So a HSC mark of 96 will give you a scaled mark of 93 and will place you in the top one percent of the subject. Add all of you scaled marks together (of your best 10 units) to work out your scaled aggregate mark. UAC also give you a table of scaled aggregates corresponding to UAIs.

 

[dp624]

no, no.
A hsc mark of 96 WILL NOT ALWAYS give a scaled 93.
Rather the person exact P99 gets a hsc mark of 96 (which can be anywhere from 95.5 to 96.4999999) and the scaled mark which results from their RAW marks gives a 93.
You should not go to the conclusion that 96 -> 93
rather it's
X raw -> 96 aligned
X Raw -> 93 scaled

 

[lyounamu]

no, no.
A hsc mark of 96 WILL NOT ALWAYS give a scaled 93.
Rather the person exact P99 gets a hsc mark of 96 (which can be anywhere from 95.5 to 96.4999999) and the scaled mark which results from their RAW marks gives a 93.
You should not go to the conclusion that 96 -> 93
rather it's
X raw -> 96 aligned
X Raw -> 93 scaled

Yep, totally agreed. dp is the master in this area.

It's also important to know that scaled mark is derived from raw, not aligned because aligned mark of 94 may include both raw marks of 90 and 91 (for example).

 

[Timothy.Siu]

so the UAI is based on the raw marks rather than the BOS aligned marks?

 

[dp624]

Yeah, raw marks.
But since we don't know those, 'scaling' aligned marks is the only solution

 

[Timothy.Siu]

Yeah, raw marks.
But since we don't know those, 'scaling' aligned marks is the only solution

ah i see, hence why UAI calculators are sometimes off by a bit(even if its made for that year)??maybe

but i guess this doesn't really matter anyway...just have to do our best

 

[dp624]

Well for marks in between the ones listed on the table the calc needs to come up with an algorithm anyways so yea. There are lots of sources of errors in estimating.

However I have sort of deduced that the cutoff for 99.95 is between 477 and 478

 

[Timothy.Siu]

Well for marks in between the ones listed on the table the calc needs to come up with an algorithm anyways so yea. There are lots of sources of errors in estimating.

However I have sort of deduced that the cutoff for 99.95 is between 477 and 478

cool, i was trying to figure that out, the gap between 99 and 99.5 is so small but the gap between 99.5 and 100 is huge...

 

[dp624]

no, as in 99.95 is from (477 or 478) to 483.5 this year. not from (477 to 478)
i shall try to figure out one for 99.90 as well EDIt: about 475?

it's easier to estimate uais at the top end

 

[Timothy.Siu]

no, as in 99.95 is from (477 or 478) to 483.5 this year. not from (477 to 478)
i shall try to figure out one for 99.90 as well

it's easier to estimate uais at the top end

yeah i knew wat u meant, i was saying that the lowest 99 was 447.1 and the lowest 99.5 was 457.1 and 10 point gap, but 100 was 483.5 thats a 26.4 point gap between 100 and 99.5

 

[dp624]

Ahk yea, my bad
I think once you get to the ~70s range the each decimal (say 200.1 to 200.2) make a difference. lawl

 

[Peteage]

no, no.
A hsc mark of 96 WILL NOT ALWAYS give a scaled 93.
Rather the person exact P99 gets a hsc mark of 96 (which can be anywhere from 95.5 to 96.4999999) and the scaled mark which results from their RAW marks gives a 93.
You should not go to the conclusion that 96 -> 93
rather it's
X raw -> 96 aligned
X Raw -> 93 scaled

We are being a little pedantic aren’t we. Your point is that UAC determines your UAI using your raw mark which are not rounded and a certain aligned HSC mark will not always correspond to the same raw mark. But most of us do not know our raw marks; therefore we can only use our aligned HSC marks to make approximations of our scaled aggregates.

yeah i knew wat u meant, i was saying that the lowest 99 was 447.1 and the lowest 99.5 was 457.1 and 10 point gap, but 100 was 483.5 thats a 26.4 point gap between 100 and 99.5

Yea I agree, that is a huge difference; there must be a small group of exceptionally well-performing students each year.