June 2010: Math II

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No. The point subtractions are calculated to provide a perfect correction for random guessing. In other words, the expected score for a completely random guess is zero. If you can eliminate one, you will statistically come out ahead by guessing. Of course, that would only work perfectly with an infinite sample size. If you are a very unlucky person and expect to miss more than one question, it might be good to avoid guessing.</p>

<p>Also, sometimes it may be safer to avoid guessing, even though guessing, on average, would result in more points. This is because you know how skipping affects your score, guessing you don’t. </p>

<p>For example, say there are 3 questions that you can narrow down to say 3 answer choices.
Rather than the possibly getting them all wrong (and thereby getting a -4 to your raw score) is may be better to leave them all blank, to assure yourself a -3.</p>

<p>Does this make sense?</p>

<p>^ It would be -0.75 points vs. 0 points…</p>

<p>Anyway, there are also scenarios in which the opposite is true. If you think there’s a good probability that you got every other question right, guessing is advantageous because the 0.25 point subtraction isn’t enough to alter the rounded score.</p>

<p>For the one where the answer was 9.16 degrees, you could have used the distance formula to calculate the length of all three sides then used the Law of Cosines since you have SSS. The long way, but it worked for me.</p>

<p>has anyone ever heard of somebody getting -6 for sure and still pull off 800? because some people people are telling me that the curve almost never gets below 45 nowadays…</p>

<p>@busterbeetle
Dont count on it. Its possible, but really unlikely
Either way “The good thing about being pessimistic is that your either always right or pleasantly surprised”.</p>

<p>@realitybugell - no, I don’t believe that makes sense. If you can eliminate, 2 choices to leave yourself with 3, you are better off guessing all 3, because statistically, you will get 1 right and wind up with a 0.5 rather than a 0. (+1 - .25 - .25) vs. (0 + 0 + 0)</p>

<p>is minus 7 and skipping 4 about a 700?</p>

<p>@ Jack that would be around a 730</p>

<p>hey sorry for asking this
but the #48 question on the test where there was something like f(3)-f(1)
was it C??? Anyone remember?</p>

<p>The answer was 6… at least that’s what I got</p>

<p>@youwrotethis: awesome! thanks!</p>

<p>Can someone refresh my memory on which question was the “equilateral triangle, perimeter 15”?</p>

<p>What would you guys think 3 omitted and 3 wrong would be? </p>

<p>Depending on a good, bad, and average curve?</p>

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About 6 days, during which I took 9 practice tests. I had this long schedule planned for the 7 days before Saturday, but I failed to meet most of my schedule as I always do. :-/</p>

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<p>50-3-(.25*3)=46.25–>46</p>

<p>I think a 46 is an 800 whether or not the curve is harsh.</p>

<p>@ 314159265
Wrong
5-3-3-(.25-3)=43
Which is not an 800.</p>

<p>i think the test was easy compared to previous ones atleast there was no matrixes. those suck for me</p>

<p>I thought the test was really easy- there were only 2 problems I skipped- but I’m praying I didn’t make stupid mistakes :confused: I really want an 800.</p>

<p>For the 2 I skipped, I was hoping someone could give me an explanation.
1)If the domain of a function is {1,2} which of the following CANNOT be its range?
2)This one was a drawing of a circle (I could draw it on Paint or something if someone wants) and it said find the length of chord AB</p>

<p>@ Angelin</p>

<p>The domain of the function was 2 x values, the range must then be no more than 2 y values, or else it wouldn’t be a function. There was one that had three values, the rest were one or two (both being functions, regardless of numbers)</p>