When you approximate an approximation you're gonna get errors. That's the way it is.
Maybe I should explain the train of thought.
This is not about "Let's let VCAA do all the work and just work hard".
This is about the countless "predict my SS plozzzz" threads going around.
I am not saying this is guaranteed to work. I am simply launching a discussion for a PROPOSED SS calculator/predictor.
It's all well and good to say what grades will get what, but wouldn't it be better if we had actual scores? If you knew you were at a certain level in SACs, by varying the exam score you could get a prediction occurring.
Now, the way I see it is this:
We will have VCAA's standard deviations and means. This forms the basis 30 study score.
Using proportions, we can deduce required SAC scores.
Say Methods. The exams are worth 66% of your score. Thus, your "out of 100" SACs will be moderated so that they match up with your exams.
A note: this is based on the assumption that the mean in everything gives you a 30.
By using normal probability, we can predict study scores and the apparent percentage needed to get that score.
With real data, it will become all the more meaningful.
I can already do it without real data, but it will be extremely biased towards my results, and will seem a bit weird (again, assuming the results are distributed equally)
Thus, the main problem with this is the assumptions. Does it completely render the calculator invalid? That's for you to decide. After exams, I'll design a prototype table. I'm crap at programming (only VB for me), so maybe Daniel15 or someone could do that.
At the moment, it's at a philosophical idea stage.
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