<p>“wait…did the question ask you for the x-value or the y-value?”
range = y value</p>
<p>and just play around with standard dev in your calculator - if you multiple everything in set by 5, standard dev increases 5-fold</p>
<p>^didnt know how to do that, lol</p>
<p>any1 wanna tell me what 8 omit and 2 wrong is prolly gonna be?</p>
<p>For the standard deviation question (i took the ap stat exam so i already knew the answer but i wanted to check) i just made a new List on my calculator.</p>
<p>I put random numbers in the list.
I made a second list: list2 = list1 + 2 as the function
I made a third list: list3 = list1 - 3 as the function
I made a fourth list4 = 5*list1 as the function</p>
<p>I then calculated 1-Var statistics for all three and saw which of the four had any change in the standard deviation. it was only the third.</p>
<p>@ CollegeInfo</p>
<p>probably a 770…</p>
<p>Now that we got all the answers, lets look at scores. </p>
<p>Why not predict scores based on the variance of the curves of the previous tests? Is there anyone who took Math II previously?
If so, what was your raw score and real score?</p>
<p>If you told us, I think it can help us evaluate our own scores.</p>
<p>for number 50, the radian value 1.14 + pi, I don’t get that. Cus if you imagine a unit circle, 1.14 + pi would just be the opposite side, and if you extend it, both will be the same line. so…i didnt get that.</p>
<p>@stanford1463
the period is 2pi so pi would result in a negative value</p>
<p>the minumum was -1.93 if calculated it on your calc</p>
<p>Is it possible for someone to elaborate on these problems? </p>
<ol>
<li>10 consecutive positive integers; II only, median = mean</li>
<li>3 Trig functions: II and III only</li>
<li>Inverse of f was given, find x for f(x)=5, x=0</li>
<li>Some problem about the greatest x-intercept with a function that was given as c-bx+ax^2</li>
<li>Function was discontinuous at 2</li>
<li>What values can k be such that 2x + ky = 1 hits the y-axis in the xy plane? Answer: All real values except 0</li>
</ol>
<p>I remember all my other answers or know that they should be easy enough to get it correct. Now i’m 3 omit 2 wrong so really borderlinging 800 :(</p>
<p>yeah, i don’t recall the “3 Trig functions: II and III only” problem.</p>
<p>@ upton:</p>
<p>It was something to the extent of…
Which of the following could be a possibility of these equations?
I. sin^2 x + cos^2 x = 0
II. 2 sin^2 x + cos^2 x = 1
III. sin^2x + 2 cos^2 x = 2</p>
<p>A. None
B. I only
C. II only
D. I and II only
E. II and III only</p>
<p>I just figured this out!</p>
<p>it’s something like: Which of these are correct</p>
<p>cos(x)^2+sin(x)^2=2
2sin(x)^2+cos(x)^2=1
sin(x)^2+2cos(x)^2=1</p>
<p>which i had “none” as my answer… didn’t think about the 0 degrees and 180 degrees problem</p>
<p>but did the question say “for some values of x” or “for all values of x”? I remembered it as “for some”, which would mean that my “none” answer was wrong…</p>
<p>what was the adult catering service question about again?</p>
<p>adult catering: 75 people cost $1550, 50 people cost 1050, what was 120 (or 125) people’s cost going to be</p>
<p>intercept was $50, and then $20 per person</p>
<p>isn’t the pythagorean identity: sin^2 x + cos^2 x = 1
so to remain valid, all terms must be multiplied by a constant: i.e:
2sin^2 x + 2cos^2 x = 2 i don’t exactly recall…</p>
<p>kyoko: thanks!
ok i remember that one. I just found the slope and all that what you just said to do pretty much. sweet!</p>
<p>Yah I think kyoko’s problem is the actual one.</p>
<p>^yup it was 120 people</p>
<p>does any one remember what the question with the beach asked exactly and the numbers for some reason i feel like i might have messed up? and i think the curve should be the same as the official college board test i think it was 44/50 and still a perfect score. I skipped exactly six i hope i get all the others right</p>