http://m.mercurynews.com/sjm/d...d=hxSTmzei
11 students from a class of 15 scored perfect on the AP test. Only 33 perfect scores out of Millions.
Did these kids find a way to Kip Lipton the test? Could be a phenomenon but where there's smoke...
Why would you assume independence? Congrats on wasting your time to accomplish nothing.
jamin wrote:
Let the aspiring actuary answer this.
Given that the chance of a randomly selected AP Micro Econ student getting a perfect score is 33/67782, the chance that 11 of 15 randomly selected AP Micro Econ students got a perfect score is
15! / (11! * 4!) * (33/67782) * (32/67781) * ... * (22/67771) * (67785/67770) * (67784/67769) * (67783/67768) * (67782/67767)
-- which I don't want to calculate, but I assure you it's low --
and this is if we assume independence.
That's why I underlined that fact. Obviously there's not independence because students in a given class might be extra motivated if that class is in a prep school or if the teacher offered some big prize to everyone who gets a perfect score.
fdgdghgfnjs wrote:
Why would you assume independence?
So then why post the(incorrect) math?
jamin wrote:fdgdghgfnjs wrote:That's why I underlined that fact. Obviously there's not independence because students in a given class might be extra motivated if that class is in a prep school or if the teacher offered some big prize to everyone who gets a perfect score.
Why would you assume independence?
Haters gonna hate, but I appreciate you posting this
jamin wrote:
Let the aspiring actuary answer this.
Given that the chance of a randomly selected AP Micro Econ student getting a perfect score is 33/67782, the chance that 11 of 15 randomly selected AP Micro Econ students got a perfect score is
15! / (11! * 4!) * (33/67782) * (32/67781) * ... * (22/67771) * (67785/67770) * (67784/67769) * (67783/67768) * (67782/67767)
-- which I don't want to calculate, but I assure you it's low --
and this is if we assume independence.
The logical conclusion is Target is not the only outfit to get hacked recently. The odds, I think, are somewhat less than finding a Higgs Boson.
jamin wrote:
Let the aspiring actuary answer this.
Given that the chance of a randomly selected AP Micro Econ student getting a perfect score is 33/67782, the chance that 11 of 15 randomly selected AP Micro Econ students got a perfect score is
15! / (11! * 4!) * (33/67782) * (32/67781) * ... * (22/67771) * (67785/67770) * (67784/67769) * (67783/67768) * (67782/67767)
-- which I don't want to calculate, but I assure you it's low --
and this is if we assume independence.
no, but spelling does.
No problema wrote:
Memorizaing doesn't help in college though.
Introducing conservatism into your estimates while clearly stating your assumptions is done all the time in actuarial work, especially when the unknown piece(s) of the equation is going to be a rough estimate at best (such as the correlation between the scores of the students in question due to their shared background). Well done Jamin.
fdgdghgfnjs wrote:jamin wrote:So then why post the(incorrect) math?fdgdghgfnjs wrote:That's why I underlined that fact. Obviously there's not independence because students in a given class might be extra motivated if that class is in a prep school or if the teacher offered some big prize to everyone who gets a perfect score.
Why would you assume independence?
That was the first thing I wondered; did 11/15 get 5s, or did 11/15 actually answer every question on the test correctly?
rojo wrote:
The article isn't very well-written.
Reading it closely, I think all 11 of the students in the class got a 5 out of 5. That's what they are calling a 'perfect' score.
They didn't all get every question correct as the article goes out of its way to mention the one student who got all the questions right and differentiate that person.
-Rojo
My senior year AP class had everyone get a 5 out of 5 on the BC calculus exam. We had 10-15 kids in the class.
Our teacher did consult for the AP so she knew what to teach us but there was no cheating involved.
rojo wrote:
The article isn't very well-written.
Reading it closely, I think all 11 of the students in the class got a 5 out of 5. That's what they are calling a 'perfect' score.
They didn't all get every question correct as the article goes out of its way to mention the one student who got all the questions right and differentiate that person.
-Rojo
My senior year AP class had everyone get a 5 out of 5 on the BC calculus exam. We had 10-15 kids in the class.
Our teacher did consult for the AP so she knew what to teach us but there was no cheating involved.