180s and percentile ranks Forum

[Reinhardt]

99.98 is not correct anymore. The percentiles were shifted downward some, and now all LSAC says is that 179 and 180 are both 99.9.

[dutchstriker]

99.98 is not correct anymore. The percentiles were shifted downward some, and now all LSAC says is that 179 and 180 are both 99.9.

I'm guessing that's just rounding. I highly doubt that both 179 and 180 are 99.90. I'd be surprised to see a 180 go from the 99.98 percentile to the 99.90 percentile in just a few years. That's like going from 24 180s to 120 180s per year (if every year there were 120,000 tests administered -- I'm estimating). I'd guess it's more like 99.95 or 99.96 now.

[febstriver]

what if i am the only person who got 100 or 101 questions correct on any particular administration? what then? still 99th?

Don't worry, you won't.

you idiot

i did take stats

and we were taught that if we have the following scores (on a test out of 5), the cumulative frequencies would be as such:

n=10
x fx cf (percentile rank)
5 1 100%
4 2 90%
3 4 70%
2 2 30%
1 0 10%
0 1 10%

[Zapatero]

what if i am the only person who got 100 or 101 questions correct on any particular administration? what then? still 99th?

Don't worry, you won't.

you idiot

i did take stats

and we were taught that if we have the following scores (on a test out of 5), the cumulative frequencies would be as such:

n=10
x fx cf (percentile rank)
5 1 100%
4 2 90%
3 4 70%
2 2 30%
1 0 10%
0 1 10%

what if i am the only person who got 100 or 101 questions correct on any particular administration?

Don't worry, you won't.

[letsdoit1982]

So exactly how many people on average get a 180? Like 30?

[xcountryjunkie]

I don't get the impression that 100 people a year get a 180 at all though. Think about that, Yale could theoretically make a class entirely of 180's. I don't believe this to be true.

I was under the impression that Yale could make a class mostly (though perhaps not entirely) of 180's if it felt like it, but there are too many people with good GPAs and good softs who are a little under that that they don't. Yale and the like do deny people with 180's sometimes.

Sometimes they do, but if there were a 100 180's, then they would only have to let in 25% of them to have a 75th percentile of 180. They aren't even close to that, I think it is 177, and I highly doubt they reject 75% of 180's.

You assume that all 180s apply to Yale. Surely this isn't true.

[febstriver]

Clearly, you are too stupid to get that when I say "what if I..." that I am not asking you to think about the probability of me getting that score but the probability of one getting that score. Also, your humor died on the last page, about 5 seconds after making that post.

[kevin261186]

what if i am the only person who got 100 or 101 questions correct on any particular administration? what then? still 99th?

Don't worry, you won't.

LOL

[Zapatero]

Your percentile rank is the proportion of people who have your score or worse. If 1 of 100 people have a 180, it's 99/100, or .99.

Regardless, this is a totally moot issue because the curve is determined before the test is even administered.

[Flanker1067]

Edit: I deleted this post because it is nonsense that does not need to be talked about on TLS. We can stop this conversation anytime.

This is interesting from a standpoint of just knowing the true numbers, but pretty much everything that has been said is speculation. Maybe you can email the LSAC and ask.

[febstriver]

Your percentile rank is the proportion of people who have your score or worse. If 1 of 100 people have a 180, it's 99/100, or .99.

Regardless, this is a totally moot issue because the curve is determined before the test is even administered.

tyty


also, for kicks, i just calculated the prob of scoring 100/100 questions correct on the LSAT by pure guessing

pn = .2(100) = 20
pq = .8(100) = 80

z = X - pn / √ (100)(.2)(.8 )

z = 80 / 4 = 20

a z-score of 20??? 20 sd above the mean? my z-score table only goes up to 4

what is the proportion of the tale 20 sd above the mean?

[Woozy]

Your percentile rank is the proportion of people who have your score or worse. If 1 of 100 people have a 180, it's 99/100, or .99.

Regardless, this is a totally moot issue because the curve is determined before the test is even administered.

tyty


also, for kicks, i just calculated the prob of scoring 100/100 questions correct on the LSAT by pure guessing

pn = .2(100) = 20
pq = .8(100) = 80

z = X - pn / √ (100)(.2)(.8 )

z = 80 / 4 = 20

a z-score of 20??? 20 sd above the mean? my z-score table only goes up to 4

what is the proportion of the tale 20 sd above the mean?

You're making it too hard on yourself.

0.2^100 = 1.27 x 10^-70

Pretty much equivalent to 0.