Statement of Marks Arrived (Anyone else wanna share too?)

[pi]

61/72
What is the most I can get?
43?

Yep, and you'd need a very very high A+ in SACs and exam 2. More likely is 40-42 high mid-high A+s.

[Max Peters]

Thanks

[thushan]

I got bored and calculated Thushan's rank in the midyears. Top 4.5% in Physics and top 3.5% in Chemistry. Obviously this isn't accurate only an estimate, or maybe not even an estimate since my concept could be all wrong LOL! *EDIT: Don't worry these percentages are definetely wrong. No way 3.5% of chem students lost 2 marks!

Anyways that 4 mark buffer for 50 is not really correct. My friend lost more than 4 marks in his midyear for Chemistry and he got 50. For other subjects it is even more strange, like my friend in Methods lost 3 marks in both exams combined and got 48 (her SACs were also super high and since she goes MacRob she has a strong cohort and it would've bumped it up)

Really want to find out more about how VCAA works their statistics. Unfortunately we can't get the standard deviation and mean for the seperate calculation for study score. It seems like the standard deviation is 7 and mean is 30 for all subjects but actually every subject is different. I know that Methods usually has a standard deviation of 29.5 and mean of 7.5 but this changes every year.

ahaha u used the z-score? not the best here; scores are not actually normally distributed in reality.

[thushan]

Lost Q18 MC (IR qn) and Q7c i got 1/2.

This, only I lost one more mark on MC Q15... *facepalm*
But of course I'm happy with 69

nice work funky!

[acinod]

I got bored and calculated Thushan's rank in the midyears. Top 4.5% in Physics and top 3.5% in Chemistry. Obviously this isn't accurate only an estimate, or maybe not even an estimate since my concept could be all wrong LOL! *EDIT: Don't worry these percentages are definetely wrong. No way 3.5% of chem students lost 2 marks!

Anyways that 4 mark buffer for 50 is not really correct. My friend lost more than 4 marks in his midyear for Chemistry and he got 50. For other subjects it is even more strange, like my friend in Methods lost 3 marks in both exams combined and got 48 (her SACs were also super high and since she goes MacRob she has a strong cohort and it would've bumped it up)

Really want to find out more about how VCAA works their statistics. Unfortunately we can't get the standard deviation and mean for the seperate calculation for study score. It seems like the standard deviation is 7 and mean is 30 for all subjects but actually every subject is different. I know that Methods usually has a standard deviation of 29.5 and mean of 7.5 but this changes every year.

ahaha u used the z-score? not the best here; scores are not actually normally distributed in reality.

lol i think so, i used normCdf([score],∞,[mean],[standard deviation])x100%. So for Chemistry I plugged into my CAS: normCdf(178,∞,102.3,41)*100%=3.24313%. Any idea how to find out the real statistics though? I've been searching for ages

[thushan]

real stats? they don't release

[acinod]

Is it possible to calculate anything if we know that for Chemistry Mid-Years - the mean is 102.3, standard deviation is 41 and our score?

real stats? they don't release

So there is no reliable way of estimating one's study score then?

[thushan]

Not really; best thing to do is to not worry too much about it and gun unit 4!!!

[paulsterio]

you cant estimate it anyway, because as we all know, the difficulty of the exams vary WILDLY from year to year, so even the Z-Scores won't be of much use (if you're using last years values for example)

[jane1234]

Anyways that 4 mark buffer for 50 is not really correct. My friend lost more than 4 marks in his midyear for Chemistry and he got 50. For other subjects it is even more strange, like my friend in Methods lost 3 marks in both exams combined and got 48 (her SACs were also super high and since she goes MacRob she has a strong cohort and it would've bumped it up)

Really?? Do you happen to know his scores for the midyear and end-of-year exams?

[paulsterio]

Anyways that 4 mark buffer for 50 is not really correct. My friend lost more than 4 marks in his midyear for Chemistry and he got 50. For other subjects it is even more strange, like my friend in Methods lost 3 marks in both exams combined and got 48 (her SACs were also super high and since she goes MacRob she has a strong cohort and it would've bumped it up)

Really?? Do you happen to know his scores for the midyear and end-of-year exams?

he would have had to get basically 100% on the end of year exam, and that exam had to be a hard exam

[thushan]

hmm, i also have a friend in macrob who lost three marks in the second exam for methods (having got 100/100 for SACs and 40/40 for exam 1) - and also got 48. we might be talking about the same person though?

I really don't know what the buffer is for chem; it varies from year to year I daresay, depending on how hard the exam is.

[paulsterio]

did you get 100% for both exams thushan, for methods?

[thushan]

yup

[mattshen]

yup

you are god-like