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  1. #1
    gsiofy's Avatar
    gsiofy is offline Junior Member 510 points
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    the 3 digit score

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    hi doctors

    about USMLE scores , I understand that the 2 digit score is the percentile , but is the 3 digit equals to the number of the right answers? what i mean if you score 240 that mean you got 240 questions right?????

    thanks

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    coralis is offline Elite Member 6100 points
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    Quote Originally Posted by gsiofy View Post
    hi doctors

    about USMLE scores , I understand that the 2 digit score is the percentile , but is the 3 digit equals to the number of the right answers? what i mean if you score 240 that mean you got 240 questions right?????

    thanks
    well... I'm only starting medschool in a month but I know the 2 digit score is NOT a percentile.
    MS I/II [x]
    Step 1 [x]
    MS III/IV [x]/[]
    Step 2 CS/CK - [x] / [x]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    http://coralismd.livejournal.com/

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    Quote Originally Posted by coralis View Post
    well... I'm only starting medschool in a month but I know the 2 digit score is NOT a percentile.

    hello doc , well good luck with your studies , you have long way to go , but as far as a lot of people did explain that the 2 digit score in usmle is your percentile among passers, I wish if someone can explain the 2 and 3 digit scores , it is kinda confusing a little

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    here's a good explanation
    Quote Originally Posted by ProspMed View Post
    Guys, honestly. I don't think have of you who are saying that 90+ is a good score know what you're talking about. MLE1 is 350 questions (i've heard 342 this year but whatever) and max score you can get (theoretically) is 300. Realistically, maybe 290-295 if your insanely smart..
    Anything at or above a 245/300 is a 99... Standard deviation for the test is 24 (too lazy to check current SD, so don't flame on me for the wrong numbers).

    To calculate your actual percentile, you take:
    (Your score/300) - Average = Points above mean
    Point above mean/ SD = z-score
    Look up Z score (search google 'z-score table' click on first link)
    Where you look across from and down from on the table depend on your z-score (these two columns need to add up to your z-score).
    Multiply this number x 100 and you have percentile.

    Soo, OP got 229/300, average i'll use is 216 and SD = 24
    229-216 = 13
    13/24 = 0.54
    0.54 is your Z-score. Look it up on link listed. So look across from 0.50 (horizontally) and from 0.04 (vertically).
    This corresponds to 0.7054
    0.7054 x 100 = 70.54 = approx 71st percentile

    So, its a good score, but not as great as some people are saying. Hope this clears up any confusion. Btw, like I said before, im too lazy to check the current average and SD for the test the OP wrote (most likely the latest) so percentile might be off by a bit.
    MS I/II [x]
    Step 1 [x]
    MS III/IV [x]/[]
    Step 2 CS/CK - [x] / [x]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    http://coralismd.livejournal.com/

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    and this pretty much is a consensus among EVERYONE knowledgeable on VMD
    Quote Originally Posted by grace View Post
    93 isn't a percentile

    If this was the case, then the 217 average would be a 50% and a 217 is more like an 85 on the score report
    MS I/II [x]
    Step 1 [x]
    MS III/IV [x]/[]
    Step 2 CS/CK - [x] / [x]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    http://coralismd.livejournal.com/

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    Quote Originally Posted by coralis View Post
    here's a good explanation

    impressive statistics , but it did not tell what the 2 or 3 digit score suppose to mean , is the 3 digit the number of question you got right in usmle , if so.. what is the 2 digit for? , i heard that anything above 240 is 99 ,

    thanks anyway doc

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    [QUOTE=coralis;1124768]and this pretty much is a consensus among EVERYONE knowledgeable on VMD[/QUOTE

    if that is the case , you are right , 217 is 50 but that is not how it goes with usmle , 185 is 75 , 220 is 90 240 is 99

    where they got these numbers from?

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    by using your 3-digit score, Mean and Standard Deviation and special statistical table, you can calculate your percentile, and by using your 2-digit score, you can calculate appr. percent of correctly answered questions. for more information, see USMLE® : General Information
    MS I/II [x]
    Step 1 [x]
    MS III/IV [x]/[]
    Step 2 CS/CK - [x] / [x]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    http://coralismd.livejournal.com/

  9. #9
    coralis's Avatar
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    [quote=gsiofy;1124770]
    Quote Originally Posted by coralis View Post
    and this pretty much is a consensus among EVERYONE knowledgeable on VMD[/QUOTE

    if that is the case , you are right , 217 is 50 but that is not how it goes with usmle , 185 is 75 , 220 is 90 240 is 99

    where they got these numbers from?
    the numbers are examples and they change with each test iteration because it is dependent on the performance of that iteration. Ex: it's possible for someone to score a 220 and have a 2-digit score of 93 in July and you can score a 220 and have a 2-digit score of 90 in August. This would suggest ppl did better during your iteration.
    MS I/II [x]
    Step 1 [x]
    MS III/IV [x]/[]
    Step 2 CS/CK - [x] / [x]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    http://coralismd.livejournal.com/

  10. #10
    gsiofy's Avatar
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    Quote Originally Posted by coralis View Post
    by using your 3-digit score, Mean and Standard Deviation and special statistical table, you can calculate your percentile, and by using your 2-digit score, you can calculate appr. percent of correctly answered questions. for more information, see USMLE® : General Information

    got it , good , it is a bit clearer now ,

    here what i got from searching



    The USMLE phased out the use of a percentile based system in 1999. A score report is given as a three-digit and two-digit score. The 3-digit score is calculated using statistical procedures that ensure that scores from different years are on a common scale and have the same meaning. The 2-digit score is derived from the 3-digit score; it is not a percentile. It is used in score reporting to meet requirements of some medical licensing authorities that the passing score be reported as 75

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