Hi. I'm currently taking Physics, Chemistry, Calculus, Statistics, Korean, Business studies. How many E credits do I need to get an ATAR score over 99.5? In which subjects do I need to get more E credits?
It isn't calculated on how many E credits you have.
ATAR scores are based on each student's best 90 level; the best 90 credits are identified by a statistical process to calculate the relative difficulty or each standard (and version) and result pair.
There are also adjustments based on intra subject and cohort comparisons that may increase the relative difficulty.
IE my ATAR is 99.55- I have 111 Excellence credits and 44 Merit Credits (in addition to my 6 subjects, I sat additional subjects outside of my school with TEKURA distance learning) Its impossible to determine what are the 'best' credits, as for my results some of my Merit credits IE lets say in Calculus externals, will likely have a statistical advantage than my excellence credits in say history internals.
it may be that the subjects you have chosen, dont produce a strong 90 credits. You want to maximise your chances. Externals are often worth the most points in the conversion. You may also find that subjects that have a smaller cohort produce less points - IE foreign languages are typically worth less in the conversion, as fictionally, lets say across NZ there's maybe 200 students in total, of which 50% of the cohort gets excellence. VS say something like Chemistry where there may be say 5000 students, of which 20% get excellence. If you get my drift.
You want a large cohort subject, which is hard to get excellence in. Chem, Physics and Calc will likely score very well.
When I was going through this process I got in touch with the Psychometrics, Reporting and Statistics team via NCEA who supplied me with a document from the previous years that showed the average stats of each standard - cohort size vs grade and loosely based my subjects off this, while also enrolling in additional standards to increase my likelihood. You cant guarantee it'll be the same but if trends follow suit it will give you an idea!
Hope that all make sense! sing out if you have any questions!