UAC compass overestimates your atar by at least 3 points for marks below 78 in English Advanced (1 Viewer)

[coolcat6778]

Explanation:
The UAC compass calculator is extrapolating the graph of English Advanced for HSC marks below 78 from origin (shown as the straight red line) because for some reason UAC couldn't use the whole dataset for their public calculator. However, using the knowledge that all English scale the same as stated by UAC themselves, we know how Advanced actually scales (same as studies and standard) (the extrapolated graphs of each subject look slightly different due to limited datasets, however in actuality they should be identical).

Because it is extrapolating the graph, it over estimates scaled marks (and hence atar) below 78 hsc mark since the curve is significantly concave up below 78. (math advanced knowledge)

This calculator https://atarestimator.streamlit.app/ from https://www.linkedin.com/posts/grah...p&rcm=ACoAAEdlYqYBx3Iby66yKAAsHsYneQxUl__wWpM correctly accounts for this and is probably the most accurate atar calculator. Otherwise, when calculating atar using UAC calculator, put english standard regardless if you do advanced since that gives the most accurate scaling data for marks between 67 and 96

 

[killer queen]

that ATAR calculator made me realise just how much English cooks me

also correct me if I'm wrong, but I thought you couldn't extrapolate a direct relationship between the returned HSC mark and the mark NESA uses for scaling? because NESA uses raw marks to calculate both separately which means that there is no direct relationship? I'm not sure

 

[coolcat6778]

that ATAR calculator made me realise just how much English cooks me

also correct me if I'm wrong, but I thought you couldn't extrapolate a direct relationship between the returned HSC mark and the mark NESA uses for scaling? because NESA uses raw marks to calculate both separately which means that there is no direct relationship? I'm not sure

it's accurate enough. The data actually comes from the UAC report themselves, where they tabulate some HSC marks against some scaled marks

 

[coolcat6778]

that ATAR calculator made me realise just how much English cooks me

also correct me if I'm wrong, but I thought you couldn't extrapolate a direct relationship between the returned HSC mark and the mark NESA uses for scaling? because NESA uses raw marks to calculate both separately which means that there is no direct relationship? I'm not sure

Also Y axis doesn't mean atar equivalent, it means scaled mark out of 100. But the UAC report reports it out of 50 and HSC marks out of 50.
An 80/100 scaled mark is good for a 95 atar provided u actually get that scaled mark in all subjects