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Thread: Scaling FAQ

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    Premium Member withoutaface's Avatar
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    Scaling FAQ

    I've seen a lot of questions on how scaling works, so I've decided to create something of an FAQ, which Lazarus can add corrections/additions to if he feels like it.

    Who determines scaling and UAIs?
    The actual calculations are performed on behalf of the universities by the Technical Committee on Scaling, which obtains the necessary HSC results from the NSW Board of Studies.

    Once all of the calculations have been done, the Technical Committee passes the data on to the UAC which then distributes UAIs to students and universities.

    What about aligning?
    This is a completely different process, carried out by the BOS, where students raw marks are aligned to standards, say if their raw mark would indicate thorough knowledge of the work they get a band 6. Raw marks, not aligned marks are used in the calculation of scaled marks and the UAI. Aligned marks are explained in more detail here.

    What is the scaled mean for a subject?
    It is, as the name suggests, the average scaled mark in a subject among all the candidates. Scaled means can be found here.

    The scaled mean for a given course is an estimate of the average academic ability of the students taking that course.

    How is the scaled mean for each subject determined?
    It is determined by calculating the performance of the average student doing a course in other subjects. This is why English is compulsory, because it provides a common subject against which scaling can be determined.
    Scaling in extension courses is determined differently, in that the only course the candidates' results are compared with are either the core subject, or in the case of extension 2, the extension 1 subject. If the average extension 2 student performs twice as well as the average extension 1 student in the extension 1 course, the scaling for the extension 2 course will be roughly twice as good as that of the extension 1 course.

    What are scaled marks used for?
    The students best two units of English and their 8 other best units have their scaled marks totalled to calculate a scaled aggregate, out of 500. This scaled aggregate is then compared to other students, the students are then ranked, and a UAI is calculated based on this rank.

    Hope this answers some of your questions
    Last edited by withoutaface; 21 Feb 2005 at 7:46 PM.

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    thats very helpful.. answers a question i asked at school today.. which my teacher wasnt entirely sure about!!!
    thanks heaps!

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    Re: Scaling FAQ

    Quote Originally Posted by withoutaface

    What about aligning?
    This is a completely different process, carried out by the BOS, where students raw marks are aligned to standards, say if their raw mark would indicate thorough knowledge of the work they get a band 6. Raw marks, not aligned marks are used in the calculation of scaled marks and the UAI. Aligned marks are explained in more detail here.
    Perhaps a stupid question, but i'm confused. So what your saying is that when determining your UAI, UAC uses your raw marks and not the ones you get from BOS?
    Last edited by rawr26; 24 Jun 2006 at 11:32 AM.

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    Your friendly HSC guide Ragerunner's Avatar
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    Re: Scaling FAQ

    That is correct. The raw marks are used by the UAC and scaled. So, technically, the marks you see when the results come out aren't used in the calculation of the UAI. But that doesn't mean they are meaningless to estimating what UAI you might get.
    B Science @ UNSW (Major in Psychology)

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    Re: Scaling FAQ

    What happens if 2 high-scoring subjects have the same mark? How would your 10 'best units' be determined then? Or if you get the same mark for all subjects?

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    Re: Scaling FAQ

    Whichever subjects scales better, they will use those subjects in the calculation of your UAI.
    Is quite inactive.

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    Junior Member gamecw's Avatar
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    Re: Scaling FAQ

    mmm then why does SAM use aligned mark to estimate UAI

    Edit:

    is it like reversed process or sumthin,

    from aligned marks to Raw marks then to Scaled mark then estimate UAI?
    Last edited by gamecw; 4 Oct 2006 at 4:00 PM.

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    Re: Scaling FAQ

    Because you'll rarely get your raw marks for your HSC exams, and even less chance of getting it before the UAIs are released. I don't know how SAM works though.
    Is quite inactive.

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    Welcome to My Lair dagwoman's Avatar
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    Re: Scaling FAQ

    dreamer7, I love your picture.

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    Re: Scaling FAQ

    Quote Originally Posted by dagwoman
    dreamer7, I love your picture.
    Why, thank you!

    Go to www.engrish.com. There are some HILARIOUS pictures on there. That's where I got my pic from.
    2007 HSC:
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    New Member benny.a's Avatar
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    Re: Scaling FAQ

    How about if your best 8 units are:
    - English advanced
    - Biology
    - Physics
    - Chemistry

    and then another of your best units is extension 1 which is only one unit. If they add one more 2 unit subject that will equal 11 units, how will determine ur UAI?
    :rofl:

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    Re: Scaling FAQ

    A 'two unit' course is made up of two units... it's possible for only one of them to count.

    Involves halving your mark.
    Lazarus
    Et in arcadia ego...

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    Retired Lazarus's Avatar
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    Re: Scaling FAQ

    1. Yes.

    2. Yes.

    3. Unclear, not enough information, try SAM.
    Lazarus
    Et in arcadia ego...

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    New Member Seidel1711's Avatar
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    Re: Scaling FAQ

    yeh thanx man
    lots of help cheers

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    Junior Member Cheap Thrills's Avatar
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    Re: Scaling FAQ

    this question has probably been asked a million times before, but they told us at school that if say for example, i get a raw assessment mark of 94 and the rest of my class gets marks of say 60s or 70s, that my moderated assessment mark will be lowered to fit in with my class better. is that true?

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    Re: Scaling FAQ

    Quote Originally Posted by buchanan
    Here's the technical scaling committee doing their thing - Shakespeare's way:

    Macbeth, Act IV, Scene 1

    A dark Cave. In the middle, a Caldron Boiling.

    [Thunder. Enter the three Witches.]

    FIRST WITCH.
    Thrice the brinded cat hath mew'd.

    SECOND WITCH.
    Thrice; and once the hedge-pig whin'd.

    THIRD WITCH.
    Harpier cries:--"tis time, 'tis time.

    FIRST WITCH.
    Round about the caldron go;
    In the poison'd entrails throw.--
    Toad, that under cold stone,
    Days and nights has thirty-one
    Swelter'd venom sleeping got,
    Boil thou first i' the charmed pot!

    ALL.
    Double, double, toil and trouble;
    Fire, burn; and caldron, bubble.

    SECOND WITCH.
    Fillet of a fenny snake,
    In the caldron boil and bake;
    Eye of newt, and toe of frog,
    Wool of bat, and tongue of dog,
    Adder's fork, and blind-worm's sting,
    Lizard's leg, and howlet's wing,--
    For a charm of powerful trouble,
    Like a hell-broth boil and bubble.

    ALL.
    Double, double, toil and trouble;
    Fire, burn; and caldron, bubble.

    THIRD WITCH.
    Scale of dragon, tooth of wolf,
    Witch's mummy, maw and gulf
    Of the ravin'd salt-sea shark,
    Root of hemlock digg'd i' the dark,
    Liver of blaspheming Jew,
    Gall of goat, and slips of yew
    Sliver'd in the moon's eclipse,
    Nose of Turk, and Tartar's lips,
    Finger of birth-strangl'd babe
    Ditch-deliver'd by a drab,--
    Make the gruel thick and slab:
    Add thereto a tiger's chaudron,
    For the ingredients of our caldron.

    ALL.
    Double, double, toil and trouble;
    Fire, burn; and caldron, bubble.

    SECOND WITCH.
    Cool it with a baboon's blood,
    Then the charm is firm and good.

    (<a href="http://www.angelfire.com/ab7/fourunit/macbeth-witchs.mp4">Video</a>)
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    Junior Member johnnypaul's Avatar
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    Re: Scaling FAQ

    I'm confused about UAI. From what I have read the UAI is based on raw marks, are these the raw marks from the actual HSC exam or from School assessments?

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    I sit here alone jemsta's Avatar
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    Re: Scaling FAQ

    have a read here...
    http://www.uac.edu.au/admin/uai.html#how
    basically to determine your UAI, they take the best 10 units, thus its out of an aggregate of 500.
    For a subject for example, after you completed the hsc exam, you get 3 columns...moderated assessment mark, hsc exam mark and your subject mark. Those marks that you get are all aligned, and not raw.
    Then BOS would use all your raw marks and scale accordingly to how you went, so basically everything hinges on the actual hsc exam.
    The school assessments is merely used to determine your final rank.
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    Rambling Spirit
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    Re: Scaling FAQ

    Quote Originally Posted by jemsta
    have a read here...
    http://www.uac.edu.au/admin/uai.html#how
    basically to determine your UAI, they take the best 10 units, thus its out of an aggregate of 500.
    For a subject for example, after you completed the hsc exam, you get 3 columns...moderated assessment mark, hsc exam mark and your subject mark. Those marks that you get are all aligned, and not raw.
    Then BOS would use all your raw marks and scale accordingly to how you went, so basically everything hinges on the actual hsc exam.
    The school assessments is merely used to determine your final rank.
    Well, best 2 units of english, then the next best 8 units out of the remaining units.
    Is quite inactive.

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