<p>I feel pretty good about that exam! Hopefully a 5 if the curve is lenient enough</p>
<p>You guys shouldn’t be discussing these answers until may 15th</p>
<p>Oh my god I was so stupid. How could I have gotten tht mixed up. I put that plants absorb green light, although they obviously dont because thats why they are green! I got #2 FRQ completely wrong…</p>
<p>When do scoring guidelines come out?</p>
<p>Can someone tell me if I’ll get any points for FRQ#2 where I said that graph 1 was chlorophyll a and graph 2 was the bacterio stuff? I cant believe I messed up on a long FRQ that shouldve been so easy…</p>
<p>
I believe that is only after they’re done grading the exams.</p>
<p>Scoring guidelines and rubrics aren’t made until after readers so through a bunch of tests because they make the rubric based in what students wrote</p>
<p>General impressions? I thought that the Multiple Choice was surprisingly easy and that the Free Response was a lot of writing, but mostly the explanation of basic concepts. As much as I hate to say it, I feel that my study time was wasted and was better geared for last year’s test.</p>
<p>I thought that the MC was really easy and most of the free response was easy with the exception of the cell type question.</p>
<p>Definitely concur with that. The multiple choice was almost all just common sense; they give you a bunch of information, you interpret it, either wrong or right. My only problem was timing as far as multiple choice. The amount of reading it makes you do, I didn’t even make it to the gridables 
(but at least I didn’t have to guess on any MC)… </p>
<p>What did you guys make of the Chi Squared Free Response? I figured the expected was 60, 0, 0, because you are expected to see all flies move to the ripe banana. Regardless, I ended up accepting my null. As far as the last part of that question, asking to propose a model… What did you guys make of that? I just figured you should explain stimuli and response and all that jargon…</p>
<p>Okay, my opinion on the null hypothesis question:</p>
<p>I don’t think 60/0/0 works. Your null hypothesis is what would happen without any factors, like the ripe banana. You would expect the flies to be distributed evenly throughout the system. The null hypothesis isn’t what you’re testing, it’s what you’re trying to disprove. Obviously we are trying to show that they WON’T spread evenly and will mostly congregate around the ripe banana, hence why we are rejecting the null hypothesis.</p>
<p>Also, you can’t have 0 in any cells, if my AP Stats memory serves me correctly. Al cells have to be greater than or equal to 5 to run the chi-squared test. And you can’t divide by 0.</p>
<p>The college board designs free responses so that you can get one part wrong and get all of the other parts right. Did the chi-squared question indicated which set of data it wanted us to use (1 minute or 10 minutes)? I don’t remember.</p>
<p>The free response was ridiculously easy. I feel cheated out of a year of actually trying to learn things. The MC was almost entirely easy, but I had to figure out that sickle cell anemia isn’t sex-linked, and the normal allele is “Wild”–I swear, 10th grade biology taught me crap that was just not even true. </p>
<p>But yeah overall the exam was not difficult. I think they did this on purpose because of the brand new format this year.</p>
<p>Good Luck in the Summer</p>
<p>Before I comment on what I thought, I want to make sure everyone knows that we can’t discuss any specifics for two days. Secondly this chi square problem and some of the others were not on my test. I know there were at least 2 formats from what I talked to people today. And the formats were completely different. Do you think that’s fair that there is different formats, or do you think it affects the grading. My FRQ were very straight forward. I just started writing and didn’t have to think about it…ALL Reasoning, with a few facts thrown in.</p>
<p>I figured the 10 minute one, since that seemed like the “results” of the experiment, but it did not explicitly indicate which set of data to use…</p>
<p>I’m taking AP Stats right now and my teacher (who was one of the teachers to develop the AP Stats curriculum) taught us that the null hypothesis always states that the proportion of each variable/category/outcome is always the same. So if she’s right, 60 0 0 wouldn’t work. With that said, I’m pretty sure there’s a no double jeopardy rule for APs so even you got the wrong hypothesis, if everything after that supports the hypothesis correctly, you’d only lose points on question C.</p>
<p>Damn… well there goes about a fifth of my points gone from the first FRQ.</p>
<p>I don’t see to many people had my version of the test, did anyone remember having form D</p>
<p>Biovball is spot on. For Chi square analyses the null has to be that the distribution of flies is even. The null is what will happen when you don’t take into consideration any factors. That’s the way it works with all signficance tests, not just Chi square. Also, one of the checks the data has to pass before you can do a Chi square test is all the expected values must be > 5. Obviously you can’t divide by 0, so I’m not sure how all of you who got 0/0/60 or some variation of were able to do the math…</p>
<p>Did anyone else feel like the frq section had too many pages for the long free responses?? I don’t know if it was just me, or if we were expected to answer that much but for each long question I didn’t go past 2 pages… Ugh. I mean I got the gist of the question, and I answered it with about a paragraph for each part. Does anyone know exactly what was expected?</p>
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