Nov. '09 - SAT Math Level 2

Test Preparation SAT Subject Test Preparation
1

<p>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?</p>

2

<p>it was fiery death and torture</p>

3

<p>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.</p>

4

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

5

<p>** Also, has the embargo been lifted?</p>

6

<p>Yes it has it been lifted</p>

7

<p>Thanks. </p>

<p>I only had a few questions, and they were all at the end.</p>

<p>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”</p>

<p>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.</p>

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

8

<p>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? </p>

<p>35/50.</p>

9

<p>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)</p>

10

<p>There are no triangles that can be made.</p>

11

<p>@ nigcrunch: </p>

<p>For the same reason I put the “none” answer. No such triangle exists.</p>

12

<p>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.</p>

13

<p>Hmm, you are probably right. I don’t remember if there was anything about congruency in the question. Bad start for me. :(</p>

14

<p>You probably did fine, there’s always a big curve, and I think I over-thought that question.</p>

15

<p>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.</p>

16

<p>what was the answer to the percentile question?</p>

17

<p>Come on, guys, I can’t believe no one on CC knows the answer</p>

18

<p>I left it blank. I can’t believe I knew how to answer that question a week ago, but didn’t expect the normal distribution curve to come up and ended up forgetting how to do it.</p>

<p>■■■. I’ve definitely got at most 46 raw score. Can’t have make any more stupid mistakes otherwise there goes my 800…</p>

19

<p>Using normalcdf(-1E99,84,74,2) i got the answer to be 99 percentile. I didn’t know how to do it then, and I’m not totally sure that’s correct, but I got it wrong. I’m pretty sure I got like only 2 wrong though, but there’s always little mistakes. I’m hoping for the 800.</p>

20

<p>Ok Im pretty sure it’s above 99</p>

<p>If u see here</p>

<p>[File:The</a> Normal Distribution.svg - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/File:The_Normal_Distribution.svg]File:The”>File:The Normal Distribution.svg - Wikipedia)</p>

<p>99 percent of scores are within 3 standard deviations - I believe on the test 84 was 5 standard deviations away</p>