[Undergrad] UMAT 2017 Discussion Thread

Discussion in 'UMAT' started by LMG, Mar 20, 2017.

  1. nire

    nire Member

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    yeah no your definitely right, the medentry percentiles don't entirely reflect the actual umat percentile. in fact it is to my knowledge that the percentile you get on ME is much less than the actual umat. I was curious to see the differences in our percentiles, for me my percentiles were 30th , 97th and 85th. But if we were to get around 91/134. thinking optimistically, it would be around the lower spectrum of the 90th percentile range or a very high 80th percentile. this is using A1 advice that 67% of the questions right is 90th percentile and 75% of the questions right being 100 percentile.
     
  2. frootloop

    frootloop Six years down, two to go Moderator

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    @A1 do you have an ACER reference for that, or is this just the percentages you need for those percentiles on MedEntry rather than the actual test?

    Also, don't ACER weight question scores by difficulty using some statistical wizardry? So the percentage of questions you'd need to get right for certain percentiles would depend on which questions you got right?
     
  3. A1

    A1 Moderator Moderator

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    It's for the actual test but the info wasn't from ACER, it was from my expert analysis of... 2 pages worth of data.

    Max possible score 300 out of 134 Qs = 2.24 per Q if equally weighted. Since they are not and we are more likely to miss the higher ones I propose to use 2 marks per Q as a guide
    90%ile is around 180 marks = 90 Qs = 67% of the test
    99%ile is 200 = 100 Qs = 75% of the test (not sure if I said 100%ile earlier but should be corrected to 99%ile).
     
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  4. frootloop

    frootloop Six years down, two to go Moderator

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    Where'd you get the data for how many marks are required for each percentile? Like, surely there's no official UMAT data released stating that there's a maximum possible score of 300, or that 90th%ile is around 180 marks, etc?

    Your weightings calculations look pretty good as a rough guide (hard to know exactly how much the marks-per-question varies, but the estimate you've used seems fair enough), but again, I'm genuinely interested in the source of your information - even 6 years after sitting it, I'm still way too interested in the UMAT haha
     
  5. nire

    nire Member

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    if you have a raw score of 180 on your statement of results in the umat you will get 90th percentile
    just like if you have a raw score of 181 your percentile in 91st.
     
  6. nire

    nire Member

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    theoretically the highest raw score you can get for a section is 100
    hence there are three sections so theoretically the highest score you can get is 300. which most likely equates to getting 100% of the questions rights, a feat which im pretty sure no one has achieved thus far
     
  7. A1

    A1 Moderator Moderator

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  8. frootloop

    frootloop Six years down, two to go Moderator

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    There have been raw scores of over 100 before (not that they're common enough to really affect your calculations), so I'd probably take ACER's sweeping statements with a grain of salt.

    Your logic all works out pretty well with the information you've got, but I'd be careful about being too confident that you've worked ACER out. The statistical wizardry they do behind the scenes is insanely complicated, so I very much doubt that working out the number of questions a candidate has gotten right is as straightforward as your calculation.

    Your conversion calculation is probably a pretty good rough guide for people anxiously wanting to get an idea of where they stand heading into the test. But I'd caution them to use it as a guide only.

    As the source you've linked states, 'It is not possible for candidates to replicate this process'. They're super anal about keeping their methods hush-hush, and they aren't dumb enough to give you enough information to replicate their processes on their publically-accessible website haha
     
  9. A1

    A1 Moderator Moderator

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    The 2010-12 S1 curves did show section scores up to 107-108. The last 2-3 years they stop at 100 or a little lower so there has been a change in that regard.
    I wrote this reply on Atarnotes forum, copying it here for your info:

    "Five years ago UMAT used to be valid for 2 years, (I think) ACER needed to scale the marks of one year to be comparable with the previous year since they could compete directly against one another in the same applicants pool. The maths resulted in some going over 100, not fair to chop them to 100 while leaving the year cohort alone, but also not fair to scale the whole cohort down as it would advantage the previous year. This is no longer needed".

    The other comments from you are true. I provided this guide with the comforting thought no-one is going into the test aiming specifically for said 90 correct Qs. They of course try for as many as they can get, for now just to calm them down that they don't need to get 90% of the test to get 90%ile.
     
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  10. frootloop

    frootloop Six years down, two to go Moderator

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    I'd wondered why I hadn't heard of any >100 raw scores in a while, that definitely does make sense. I hadn't thought about how making UMAT scores valid for only one year instead of two would affect the top end of the scores!
     
  11. nire

    nire Member

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    does any body know what time the am session is held? i'm pretty sure its around 9am but not sure,.
     
  12. LMG

    LMG Regular Member

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    I think it depends on the venue. Some may be slightly earlier than 9am (say, 8.30, or 8.45), and some slightly later (9.15 or 9.30). Hobart is 9am. As is Launceston. I'm less familiar with non-Tasmanian location start times, but I do recall there was some (though minimal) variability.
     
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  13. Sherlock

    Sherlock MSO's very own Cult Hero

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    You can get the UMAT app on your mobile device. It specifies times for all locations :)
     
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  14. LMG

    LMG Regular Member

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    If those times are true (and I actually doubt they are), then the Hobart and Launceston ones have been brought forward by 45 minutes. Given there are no afternoon sessions in either location, I don't see the point of this. Hence, I don't think the published times are accurate. Happy to eat my hat if my assumption about their incorrectness proves... incorrect! :D
     

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