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Author Topic: is 40+ss possible?  (Read 1954 times)  Share 

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scope7

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is 40+ss possible?
« on: July 07, 2021, 09:06:35 pm »
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Hi everyone, if anyone is interested in answering is there anyway I can get a 40+ss based on these biology 1st semester sac scores.
Unit 3 sacs: 48% and 52% = 50% averaged sac scores around 60/80 rank

Is there any chance I can get a 40+ss if I improve throughout the year and if so what scores would I have to achieve for semester 2 sacs and exams

Thanks
« Last Edit: July 07, 2021, 09:19:30 pm by scope7 »

Stormbreaker-X

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Re: is 40+ss possible?
« Reply #1 on: July 08, 2021, 02:23:55 am »
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Hi everyone, if anyone is interested in answering is there anyway I can get a 40+ss based on these biology 1st semester sac scores.
Unit 3 sacs: 48% and 52% = 50% averaged sac scores around 60/80 rank

Is there any chance I can get a 40+ss if I improve throughout the year and if so what scores would I have to achieve for semester 2 sacs and exams

Thanks
Well unit 4 is worth 24% and the exam is worth 60% so I would say potentially you still could if you do really well in unit 4.

abcedfg38

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Re: is 40+ss possible?
« Reply #2 on: July 08, 2021, 10:27:43 am »
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You can definitely get 40+, but you’re going to have to improve by a lot. Like your ranking must go up to 10 or even 5-8 (depending on how good your cohort does). 

schoolstudent115

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Re: is 40+ss possible?
« Reply #3 on: July 08, 2021, 03:15:54 pm »
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Hi everyone, if anyone is interested in answering is there anyway I can get a 40+ss based on these biology 1st semester sac scores.
Unit 3 sacs: 48% and 52% = 50% averaged sac scores around 60/80 rank

Is there any chance I can get a 40+ss if I improve throughout the year and if so what scores would I have to achieve for semester 2 sacs and exams

Thanks
Well let's break down the situation:
Unit 3 = 16% allocation, Unit 4 = 24% allocation and Exam = 60% allocation
That is, unit 4 has 1.5 times the weighting of unit 3, and the exam has 3.8 times the weighting of unit 3.
If your unit 3 is at 50%, which is probably in the study score range of high 20s (effective z-score = -0.285714286)
NOW, to get 40, your effective z-score needs to be around 1.428.
Unit 3 z-score weighted = -0.2857 * 0.16 = -0.045712   (I am calculating this by doing (score-mean)/sd)
Hence 0.24*a+0.6*b = 1.473712 (if you want the total weighted sum to be 1.428)
So, if your scaled unit 4 score is an effective study score of 40, (z=1.428), then you need an exam z-score of 1.88498667 (effective ss of 43). Now, these z-scores will all be fit to some distribution depending on the state's performance, but the essence is the same.
In essence, if you can rank well in unit 4 (at least 15/80 in a strong cohort, 7-10/80 in an average cohort), and you do fairly well in the exam, then yes 40+ is possible. You don't have to overcompensate much in U4 and exam since U3 doesn't count for much at all.


2021: ATAR: 99.95
2022-2024: University of Melbourne, BSci (Major in Mathematics and Statistics)

scope7

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Re: is 40+ss possible?
« Reply #4 on: July 08, 2021, 08:47:13 pm »
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Thanks a lot for the hope guys

scope7

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Re: is 40+ss possible?
« Reply #5 on: July 08, 2021, 08:47:52 pm »
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Well let's break down the situation:
Unit 3 = 16% allocation, Unit 4 = 24% allocation and Exam = 60% allocation
That is, unit 4 has 1.5 times the weighting of unit 3, and the exam has 3.8 times the weighting of unit 3.
If your unit 3 is at 50%, which is probably in the study score range of high 20s (effective z-score = -0.285714286)
NOW, to get 40, your effective z-score needs to be around 1.428.
Unit 3 z-score weighted = -0.2857 * 0.16 = -0.045712   (I am calculating this by doing (score-mean)/sd)
Hence 0.24*a+0.6*b = 1.473712 (if you want the total weighted sum to be 1.428)
So, if your scaled unit 4 score is an effective study score of 40, (z=1.428), then you need an exam z-score of 1.88498667 (effective ss of 43). Now, these z-scores will all be fit to some distribution depending on the state's performance, but the essence is the same.
In essence, if you can rank well in unit 4 (at least 15/80 in a strong cohort, 7-10/80 in an average cohort), and you do fairly well in the exam, then yes 40+ is possible. You don't have to overcompensate much in U4 and exam since U3 doesn't count for much at all.
I never thought of it this way, thanks

schoolstudent115

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Re: is 40+ss possible?
« Reply #6 on: July 08, 2021, 08:52:36 pm »
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I never thought of it this way, thanks
No problem. What I've done is actually how vcaa calculates study score in the statement of study score (except I've used a normalised version of the z-scores which should still be a very strong approximation).
2021: ATAR: 99.95
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scope7

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Re: is 40+ss possible?
« Reply #7 on: July 09, 2021, 08:59:54 am »
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(at least 15/80 in a strong cohort, 7-10/80 in an average cohort)

what if it was in a weak cohort?

schoolstudent115

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Re: is 40+ss possible?
« Reply #8 on: July 09, 2021, 01:48:09 pm »
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what if it was in a weak cohort?
Top 5-ish (assuming the class strength distribution is normally distributed) which essentially means that the skill distribution at the top end is expected from the general cohort strength. Try to gauge just how strong the top of the cohort is (is it unusually strong given the cohorts strength? are there a lot more people than expected? etc.)

For example, my Physics cohort was average at best, and the upper end reflected that (cohort of about 40, and 3 individuals got 40+, which is expected as that is 7.5% of the cohort -- and 40+ has an occurence of about 8%).
2021: ATAR: 99.95
2022-2024: University of Melbourne, BSci (Major in Mathematics and Statistics)