How to find what 'percentile' you are, based on your study score.

[daliu]

Being bored at 1:15AM in the morning and using some basic Methods knowledge, you can figure out your percentile (e.g. if you're in the top 1.5% or 3.46% or whatever for individual subjects) based on your study score. Here's how to do it: Sorry but you need a CAS calculator!

Into your CAS calculator, type the following without quotes (type the number of your study score where "[your study score]" is used):

"normcdf([your study score],,30,7)"

Then, multiply the result by 100 to get the percentile.

For example Say I got a 45 in English. I would type normcdf(45,,30,7) to get 0.016062. Then, multiplying the result by 100 gives 1.6062, which means that I am in the top 1.6062% of people who did English.

Be it for a temporary ego boost or for the lulz or whatever, this is just kind of nifty and informative. It's also useful for explaining to people that don't know the VCE system where you actually are compared to everyone else, if you need to. Asian parents are part of this demographic, for example, so you avoid unnecessary conversations like "you only get 50?? Why no get one hundred?!" and et cetera.

[iloveschool]

it didnt work for me i got 1. something when usng your formula :s

[iloveschool]

and thats before multiplying

[Vincezor]

and thats before multiplying

If you have a classpad, just switch the last 2 numbers. so it's normcdf([SS],infinity,7,30) because the classpad is silly X___x

[pi]

This is so nerdy...

[daliu]

This is so nerdy...

Helps that I'm a nerd, then.

Moderator action: removed real name, sorry for the inconvenience

[BubbleWrapMan]

Not sure if this is right, I looked at the stats they give on the site, and it seems to match up better if you do, for 40 for example, from 39.5 to infinity, i.e. from 39.5 to 40.5 is the group who gets 40. Not really sure though. o.o But it gives all of the numbers that are on the site, i.e. 39.5  to infinity is 8.74% (approx 9% like it says on the site) while from 40 to infinity is 7.66%. But yeah I'm not sure. And anyway it's kind of pedantic, lulz.

[Jdog]

its because you need to change the standard deviation for each one.

[daliu]

Not sure if this is right, I looked at the stats they give on the site, and it seems to match up better if you do, for 40 for example, from 39.5 to infinity, i.e. from 39.5 to 40.5 is the group who gets 40. Not really sure though. o.o But it gives all of the numbers that are on the site, i.e. 39.5  to infinity is 8.74% (approx 9% like it says on the site) while from 40 to infinity is 7.66%. But yeah I'm not sure. And anyway it's kind of pedantic, lulz.

Oh yeah, I totally forgot about rounding. You're completely right.

[Phy124]

If you want to get really iffy you can use the standard deviations in the scaling report. Found in the column "Std. deviation".

[jourdy]

JDog you must've failed English to only get 93 with those scores!

[pi]

JDog you must've failed English to only get 93 with those scores!

Um.. He got a lot better than 93 atar LOL and he beasted English...

How did you even find this thread?

/locked