Possibility of Study Score Calculator?

[reg]

I'm 99% sure VCAA are dirty scammers.

I've been writing this calculator, and we can see valid results for a 30 score:


But trying for a 45 score:


More than 100% for GA1 and GA2? What?

Assumption 1: I was under the impression that, for example, a median in each GA would contribute equally EDIT: proportionally, not equally, equitably to a median study score (where GA1 = 50, GA2 = 50, GA3 = 400 marks) .......

Assumption 2: Pr(STUDY > 45) = 1 - 0.983938. Hence, taking the inverse of each GA for 0.983938 should give the required score for each GA?

Or have I got it wrong?  ... this is all based off exact data provided by VCAA about 2006 ..

It's not a coding error either, my calculator agrees with me.

F U VCAA.

[kingmar]

Funny. We both get the same results.

I couldn't write jack for DOS programs.

If you look at the proportions, the distributions are NOT normally distributed. That's why it must all be manually inputted.

I'm sure you'll find the French Exam scores are a little too high as well. As long as all your code is correct, I'm sure that's the issue. That's why assumptions are no good.

To be honest, I suspect VCAA do their own twiddling in the meantime. I'm certain that even with crap exam scores, I can still do well because I suspect they take your OTHER studies into account when moderating your scores.

i.e. I get average 45 in all my subs except a 30 in methods.
VCAA inexplicably lift my methods score to 33. Why? Because of the moderating process.

They don't tell you everything, though... So yes, it is difficult. That's what real data can help you with.

EDIT: I might do some more research into the grading process undertaken by VCAA. This looks like an interesting side project.

[reg]

Meh, as coblin said, the lack of transperancy in the system is a bad thing...

Here's my code anyway. Written in C++, for gnu gcc. Using boost::regex
study_calc.cpp - http://pastebin.com/f4755d394
study_calc.h - http://pastebin.com/f4f938292

Binary + sources: http://download.yousendit.com/0D05BBE02DCF3328

Only one set of grade data included (for French), but it can be generated by getting a PDF scaling report from VCAA, saving it as .txt with Foxit PDF Reader, and my program will parse the rest.

My thoughts: this is bloody stupid. vcaa says study's are normally distributed mu = 30 sd = 7, no?

[kido_1]

That is pretty hardcore

[hakeemthedream]

edited

just wait for your SCORE! either way you get the same score wether you spent 50 years making the study calculator or you didnt and enjoyed life!

lol

[ninwa]

I think you're talking about an ENTER calculator. They're working on a study score calculator. It's different

[kingmar]

This side project is on hold while I have exams, so I don't have anything at the moment.

This is not for me. I don't think anyone understands. I can already guess reasonably accurately my scores, so I don't care.

This is intended to be a solution to all the "predict my study score! plz plz plz i'll give you candy" kind of threads that spam the forums. A lot of people want to know, so if something could be devised that addresses it, wouldn't that be good?

I'm not stupid. Don't I know that I'll get the same scores whatever I do?
I repeat, this is NOT ABOUT ME, it's about THOSE THAT WANT TO KNOW SCORES.

Read the WHOLE topic before you make premature judgements. If you have nothing constructive to say, don't say it. I'll do my work when I'm through with exams and I'll post what I end up discovering.

Until then, wait on. Only 6 days until I'm done with chinky-chi-cho.

[Daniel15]

I'm 99% sure VCAA are dirty scammers.

I've been writing this calculator, and we can see valid results for a 30 score:
(Image removed from quote.)
[other stuff...]

Why'd you take a screenshot of text instead of copy-and-pasting it?
Edit: Ewww, spaces for indentation in the .cpp file  :shock:. Hard tabs FTW

saving it as .txt with Foxit PDF Reader,

Foxit can save PDFs as .txt files?
I've been copying and pasting stuff from PDFs to get the text from them!

[kingmar]

I spent two hours on it tonight.

At the moment, based on rough guesses and my Accounting scores (and some guy's BM marks), I still need to adjust some values...

I will post an excel spreadsheet when I work out the true values. I'm getting there...

Otherwise, just sit tight with this.

[Mystery]

Funny. We both get the same results.

I couldn't write jack for DOS programs.

If you look at the proportions, the distributions are NOT normally distributed. That's why it must all be manually inputted.

I'm sure you'll find the French Exam scores are a little too high as well. As long as all your code is correct, I'm sure that's the issue. That's why assumptions are no good.

To be honest, I suspect VCAA do their own twiddling in the meantime. I'm certain that even with crap exam scores, I can still do well because I suspect they take your OTHER studies into account when moderating your scores.

i.e. I get average 45 in all my subs except a 30 in methods.
VCAA inexplicably lift my methods score to 33. Why? Because of the moderating process.

They don't tell you everything, though... So yes, it is difficult. That's what real data can help you with.

EDIT: I might do some more research into the grading process undertaken by VCAA. This looks like an interesting side project.

does that mean, if you do badly in 4 of your subjects but the other 2 are good e.g: 45, 45, 25, 25, 20, 20
then your 45's will go down to like 42 or something?

So much for moderation....

[Collin Li]

To be honest, I suspect VCAA do their own twiddling in the meantime. I'm certain that even with crap exam scores, I can still do well because I suspect they take your OTHER studies into account when moderating your scores.

i.e. I get average 45 in all my subs except a 30 in methods.
VCAA inexplicably lift my methods score to 33. Why? Because of the moderating process.

They don't tell you everything, though... So yes, it is difficult. That's what real data can help you with.

EDIT: I might do some more research into the grading process undertaken by VCAA. This looks like an interesting side project.

Was that example merely an illustration of a suspicion?

I don't think it's true. They have a similar idea where they look at your other raw scores in order to determine the scaling of the subject, but it is aggregated statewide. They find the average of "average raw scores" that every student taking a particular subject got, and they set that score as the score that 30 will scale to. The way this works is because if you have an especially smart cohort taking Specialist Maths, the competition will be high. In order to standardise this against other subjects, they look at how every student in Specialist Maths went in their other subjects, and take the average of the "average raw score of each student" (that's a mouthful!) to determine the scaling.