nigcrunch

Anybody think this test was particularly easy. A few tricks at the end, but nothing more than that. Curve will probably be small. What do you guys/gals think?

thenatural

it was fiery death and torture

nith901

nooooooooo i want a BIG curve on this one. I know I missed 2...
I feel like if I had more time, I could've figured 1 of them out.

nigcrunch

Damn. Lol. I thought it was a lot easier than the October test, at least.

nigcrunch

** Also, has the embargo been lifted?

mabsjenbu123

Yes it has it been lifted

nigcrunch

Thanks.

I only had a few questions, and they were all at the end.


Does anyone know how to do that percentile one. It was like "74 is the mean of all scores, what percentile is a score of 84 in with a standard deviation of 2"

Also, the question about how many noncongruent triangles exist to the triangle ABC such that AB=6, BC=4 and Angle A =42. I said there is an infinite amount, because using the Law of Sines, I found that this triangle couldn't exist. But, I'm not sure.

Lastly, I totally forgot how to find the center of a conic, did anyone get that question?

SwaGGeReR

I had precal last year, so I didn't remember much of anything. I'll be retaking in Jan. along with Bio. Anyways, anybody want to tell me how bad I did?

35/50.

sylviecerise

For the conic one you had to complete the squares for x and y and then find out what the values inside were. I think it ended up being (x+2)^2 and (y-5)^2, so the center was (-2,5)

Josmur

There are no triangles that can be made.

Miss Princeton

@ nigcrunch:

For the same reason I put the "none" answer. No such triangle exists.

nigcrunch

right on, i completed the squares and got that too. and Miss Princeton, It said noncongruent, so i thought that none can be congruent to a triangle that does not exist, so there are infinitely many noncongruents. but who knows, little tricky.

Miss Princeton

Hmm, you are probably right. I don't remember if there was anything about congruency in the question. Bad start for me.

nigcrunch

You probably did fine, there's always a big curve, and I think I over-thought that question.

nick321

Percentile is the 'cumulative' frequency of (-Inf, x) which you can calculate with normcdf. And the triangle answer is probably zero, non congruent triangles means simply that you should only count triangles that have at least one side or angle different.