Class Rank Estimator

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NYC Law
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Re: ITT: Someone estimates your class rank.

Postby NYC Law » Thu Jun 16, 2011 5:21 pm

dailygrind wrote:
NYC Law wrote:I used a mini z table and 6.8 wasn't included. 6.8 has been added, so try it now.


Oh, I think I see how you're doing it. Did you use normsinv? The formula's straightforward:

=(data point gpa - mean gpa)/normsinv(1-(data point rank/100)


I just ended up using NORMDIST to get the final rank, I figured thats what you were talking about since I was missing that last step. But I see what you mean, it's pretty rudimentary atm. The thing about those google docs is they ensure chaos since everything everyone does is updated real time for everyone else, but its the only thing I've found for making public spreadseets. I'll use that norminv formula though, give me a sec

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dailygrind
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Re: ITT: Someone estimates your class rank.

Postby dailygrind » Thu Jun 16, 2011 5:23 pm

NYC Law wrote:
dailygrind wrote:
NYC Law wrote:I used a mini z table and 6.8 wasn't included. 6.8 has been added, so try it now.


Oh, I think I see how you're doing it. Did you use normsinv? The formula's straightforward:

=(data point gpa - mean gpa)/normsinv(1-(data point rank/100)


I just ended up using NORMDIST to get the final rank, I figured thats what you were talking about since I was missing that last step. But I see what you mean, it's pretty rudimentary atm. The thing about those google docs is they ensure chaos since everything everyone does is updated real time for everyone else, but its the only thing I've found for making public spreadseets. I'll use that norminv formula though, give me a sec


Oh, my bad. I think I wasn't paying attention when I wrote that bit out. It's been a while since I thought about this stuff and I get sloppy occasionally. I made the spreadsheet a while back, though, so all the math on that part is still good.

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NYC Law
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Re: ITT: Someone estimates your class rank.

Postby NYC Law » Thu Jun 16, 2011 5:29 pm

dailygrind wrote:
NYC Law wrote:
dailygrind wrote:
NYC Law wrote:I used a mini z table and 6.8 wasn't included. 6.8 has been added, so try it now.


Oh, I think I see how you're doing it. Did you use normsinv? The formula's straightforward:

=(data point gpa - mean gpa)/normsinv(1-(data point rank/100)


I just ended up using NORMDIST to get the final rank, I figured thats what you were talking about since I was missing that last step. But I see what you mean, it's pretty rudimentary atm. The thing about those google docs is they ensure chaos since everything everyone does is updated real time for everyone else, but its the only thing I've found for making public spreadseets. I'll use that norminv formula though, give me a sec


Oh, my bad. I think I wasn't paying attention when I wrote that bit out. It's been a while since I thought about this stuff and I get sloppy occasionally. I made the spreadsheet a while back, though, so all the math on that part is still good.


Just used your formula so it should be a lot smoother now

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dailygrind
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Re: ITT: Someone estimates your class rank.

Postby dailygrind » Thu Jun 16, 2011 5:31 pm

NYC Law wrote:Just used your formula so it should be a lot smoother now


Awesome, nice job, man. I'll edit your spreadsheet into the OP.

NarwhalPunter
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Re: ITT: Someone estimates your class rank.

Postby NarwhalPunter » Thu Jun 16, 2011 5:31 pm

NYC Law wrote:I started making an excel spreadsheet for kicks, but I hit a speed bump at the final step. Is there a way to calculate the p from the z score with a formula in excel? My stats memory is a little fuzzy...

Heres what I have so far
https://spreadsheets.google.com/spreads ... n_US#gid=0


You're a badass. Thanks for this.

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NYC Law
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Re: Class Rank Estimator

Postby NYC Law » Thu Jun 16, 2011 7:46 pm

Man you guys were quick to mess it up. Only edit the fields in blue.

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JusticeHarlan
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Re: Class Rank Estimator

Postby JusticeHarlan » Fri Jun 17, 2011 7:01 am

Awesome! Thanks a lot.

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shepdawg
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Re: Class Rank Estimator

Postby shepdawg » Fri Jun 17, 2011 8:01 pm

Is there a way to convert gpa's from a 95 scale to a 4.0 scale?

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dailygrind
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Re: Class Rank Estimator

Postby dailygrind » Fri Jun 17, 2011 8:42 pm

shepdawg wrote:Is there a way to convert gpa's from a 95 scale to a 4.0 scale?


Maybe there is, but that shouldn't matter. Your 95 scale can be estimated as is. Just pretend the examples correspond with whatever works at your school. The math should work the same.

Hadlendale
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Re: Class Rank Estimator

Postby Hadlendale » Fri Jun 17, 2011 9:51 pm

Anyone know a good method for obtaining an example data point? Or is this just something that is available via google for certain schools?

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dailygrind
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Re: Class Rank Estimator

Postby dailygrind » Fri Jun 17, 2011 10:32 pm

Hadlendale wrote:Anyone know a good method for obtaining an example data point? Or is this just something that is available via google for certain schools?


Word of mouth for what determines honors, I would imagine. My school has a law review grade-on for the top 25 students in our class of ~370, and typically number 25 falls somewhere in the area of 3.7 (this is the common lore of the school, anyway), so we use 3.7 and 25/370 = top 6.8% as our data point.

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existenz
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Re: Class Rank Estimator

Postby existenz » Sat Jun 18, 2011 4:27 pm

This is awesome, thanks.

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Bronte
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Re: Class Rank Estimator

Postby Bronte » Sat Jun 18, 2011 5:37 pm

Lol, looks some someone deleted the formulas.

Edit: Err, I think I fixed it. Someone who should check it though because I've mostly forgotten how to do this.

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NYC Law
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Re: Class Rank Estimator

Postby NYC Law » Sat Jun 18, 2011 10:17 pm

If anyone fucks it up just right click the protected copy and select duplicate.

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Bronte
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Re: Class Rank Estimator

Postby Bronte » Sat Jun 18, 2011 10:44 pm

NYC Law wrote:If anyone fucks it up just right click the protected copy and select duplicate.


Ha, that would have been easier.

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dailygrind
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Re: Class Rank Estimator

Postby dailygrind » Sat Jun 18, 2011 10:45 pm

Nice. This thread looks solid enough to stick around for a while.

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Bronte
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Re: Class Rank Estimator

Postby Bronte » Sat Jun 18, 2011 10:54 pm

Lol these guys can't help but fuck it up. I can rewrite it unless NYC Law wants to do that revert you were talking about.

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FantasticMrFox
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Re: Class Rank Estimator

Postby FantasticMrFox » Sat Jun 18, 2011 10:55 pm

existenz wrote:This is awesome, thanks.

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Bronte
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Re: Class Rank Estimator

Postby Bronte » Sat Jun 18, 2011 11:01 pm

We should ask YCrevolution to set up something that's not a shared spreadsheet. There's like 10 people in there fucking with it. Someone just changed one of the categories to "your balls."

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futurelawyer413
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Re: Class Rank Estimator

Postby futurelawyer413 » Sun Jun 19, 2011 10:06 am

alredy posted this in 1L Grade waiting thread, but wanted to get some thoughts in this thread, so sry for the double posting...


where are you guys getting the mean/median 1L GPA for your school? i found some info from NALP re: top X% and associated GPAs. however, that is for graduates and not 1L. thus, is this a good indicator of class rank or not really?

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dailygrind
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Re: Class Rank Estimator

Postby dailygrind » Sun Jun 19, 2011 10:28 am

futurelawyer413 wrote:alredy posted this in 1L Grade waiting thread, but wanted to get some thoughts in this thread, so sry for the double posting...


where are you guys getting the mean/median 1L GPA for your school? i found some info from NALP re: top X% and associated GPAs. however, that is for graduates and not 1L. thus, is this a good indicator of class rank or not really?


The mean is what the courses curve to, and should be common knowledge at most schools. It'll do as a fill-in for the median, which is harder to get. Median at graduation and median as a 1L may or may not be the same, dependent upon whether or not the 1L classes are held to the same curve. At some schools I'm told that it drifts upwards.

dusk2k2
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Re: Class Rank Estimator

Postby dusk2k2 » Wed Jun 22, 2011 12:53 am

I'm not so good with math, but this seems to not work in determining class rank at my school. For example, my school gives A+ and all first year classes are curved between 3.0 and 3.3. Yet, using historical numbers, when I put an example gpa of 4.0, it gives a class rank of approximately top 6 percent. This simply cannot be. Heck, when I put the highest gpa in the class, it gives a percentile of top 3 percent. Can anyone explain how this math works?

paulinaporizkova
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Re: Class Rank Estimator

Postby paulinaporizkova » Wed Jun 22, 2011 12:58 am

DG wrote:It's not that awesome to vandalize it.


hahaha I can almost hear you saying this in person, shakin your head

nymario
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Re: Class Rank Estimator

Postby nymario » Wed Jun 22, 2011 6:47 am

Here's a question: can you list the expected GPAs for the top 20 ranked students. Obviously this will be subject to a good amount of variance, but I'm curious as to how the top 5% is likely to shake out.

Assuming 400 students, Median is 3.177 (mean 3.2 (or slightly less) -- think 3.19-3.195)
10%=3.622
15%=3.511
20%=3.477
25%=3.410

gilgamesh23
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Re: Class Rank Estimator

Postby gilgamesh23 » Wed Jun 22, 2011 4:51 pm

anyone know when class rankings typically come out? As in, how long after all final 1L grades are turned in do rankings come out typically for people?




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