<p>hahaha
when we get the scores back we should tell each other what we got ><
but seriously, this was way harder than i anticipated
but i can't believe i got an AMPLITUDE question wrong</p>
<p>yea, i thought it was pretty difficulty as well...definitely harder than the blue book tests.</p>
<p>twas hard...made me sad.</p>
<p>yeah i agree
i hope the curve will be even more lenient than the 2nd blue book test's
im so worried</p>
<p>anybody any advice on the deviation question? I didn't really get it as I had like 20 seconds left till the time was called, but I went for the option that said it doubled as I didn't see any reason why the standard deviation or mean of scores should change with the population doubling? anyone?
and anybody any luck on the q 40 something that asked for the 'equal equations' as far as I managed to get it was neither the second degree nor the fourth degree then I ran out of time so I guessed a:D</p>
<p>i said it was multiplied by 2...but i'm obviously unsure about it. funny thing is, i took AP stat, but i forgot everything.</p>
<p>for the standard deviation, I think the answer was something like 'it remains the same'. I got a little thrown off with z-score as well, but realized that it was the standard format that can be used to find SD. </p>
<p>i think matrix subtraction is far easier to memorize than ad-bc</p>
<p>i also think that it's multiplied by 2
i'm taking stats right now so i'm pretty sure..</p>
<p>oh that'd be great:) so is it so that only the element representing the population changes and the others remain the same?</p>
<p>im like 90% sure its multiplied by 2 becuase the formula for standard dev. is </p>
<p>squareroot (sum of squares of dev from mean/# of terms in set)</p>
<p>so i just picked 3 values:
2 4 6 -> square root(4+16+36 / 36)</p>
<p>if its doubled, then
4 8 12 -> square root (16+64+144 / 36)</p>
<p>if you work that out, then the 2nd answer is twice the 1st</p>
<p>i could be doing it wrong but im pretty sure thats how it is</p>
<hr>
<p>anyone remember the x is directly proportional to y question ?</p>
<p>was it I, II, and III ?</p>
<p>It's great news that everyone thinks it was hard (especially CC kids). That means the curve is going to be solid, hopefully 800 = 43+ raw score.</p>
<p>branko for the equal equations i put the choice with x^5, x^3, and x... im not sure if that's right but all of those become negative when you do f(-x) and if you multiply 0 by -1 you get 0... so it's equal?
i wasnt sure but the other ones were all a mix of even and odd powers which were wrong
am i right for that one, guys?</p>
<p>chandlerbing
i got the same answer...i graphed all of the equations & that was the only one that had the same x-intercepts for x & -x</p>
<p>nycex i kind of guessed on that question... i think i put I and III
i think you're right though</p>
<p>for the x is directly proportional to y question i got I & III..but I didn't have time to check if II was right</p>
<p>oh, awesome meili!
that's a relief because i left 12 blank so I need to get a lot right... haha
did anyone else put I and III for the directly proportional question? or was it I, II, and III?</p>
<p>for the proportion question I chose I, II, III also. wasn't sure about x is proportional to x. That really didn't make much sense but I didn't see any way how a number could not be directly proportional to itself:D</p>
<p>oh wait i remember now
I didn't think II was right because it didn't really make sense... III was definitely right and I seemed kind of... sensible but II was strange so i don't know</p>
<p>did anyone get the planes question?
I. line
II. ray
III. point</p>
<p>i put line and point. i hope that's right.</p>
<p>Ok good I put line and point as well, the ray didn't make too much sense for me.
Line is definitely right and point should be right</p>