<p>I just hate the questions that have large amounts of text - not because I can’t read or because they’re difficult, only because it’s tedious.</p>
<p>We’ve been reviewing for a while and just took a practice exam. We’re currently grading it. I got 25/40 in MC but I am doing very well in FR (I already have a strong 4). I really need to review, though. I have two practice exams that I can go over. Do you guys know if there’s a cheat sheet or something I can use as a quick review? I don’t really want to read my book again.</p>
<p>I was one point away from a 5 on my practice AP stats exam. Don’t remember what I got on the frqs off the top of my head but I got 29 m/c. In our class, we’re just reviewing now. And for me there is no excuse not to get a 5 since I sit through the class twice! My first period is student assistant with another Stats teacher.</p>
<p>I need to review Probability the most…</p>
<p>Just did a diagnostic. Got an 80/100 with a 30/40 MC. Pretty satisfied.</p>
<p>juansoto, this is for you.</p>
<p>still the best ap stats review packet: [AP</a> Statistics Cram Sheet](<a href=“http://www.docstoc.com/docs/36922314/AP-Statistics-Cram-Sheet]AP”>http://www.docstoc.com/docs/36922314/AP-Statistics-Cram-Sheet)</p>
<p>an quick review of inference tests: [InferenceGrid.xls[/url</a>]</p>
<p>and my personal favorite calculator test guide: <a href=“http://web.hcpss.org/~theimiller/Inference%20Summary.pdf[/url]”>http://web.hcpss.org/~theimiller/Inference%20Summary.pdf](<a href=“http://ge.tt/8Y6MaIH/v/0?c]InferenceGrid.xls[/url”>http://ge.tt/8Y6MaIH/v/0?c)</a></p>
<p>Thanks a lot!</p>
<p>We finished chapter 14-15 last week and we’ve been doing practice exams.</p>
<p>who else is not ready for this…</p>
<p>finished thursday last week. “review” during class time but really everyone is just studying for ap tests that come before stats.</p>
<p>I am sooo not ready for this test 
My teacher was absolutely horrible! We didn’t even review a whole practice test yet.</p>
<p>How to study?!</p>
<p>I’m screwed for this test our teacher didn’t teach us anything all year. CRAM TIME</p>
<p>What are you going to cram with though?! I have nothing</p>
<p>feeling confident. I’ve been taking FRQ’s from previous years (so far, 2007 Form B and 2008 Form A) and I’m getting 16/20’s on the first 5 and usually 2-3 on #6 assuming 25/40 on multiple choice (being conservative), I get a 5. A 4 will suffice, but I should get a 5. I should do even better when I read through the whole barron’s book.</p>
<p>it does **** me off though when you go from essentially correct to partially correct because you didn’t talk about how the strong the relationship is between two variables, or little things like that. But I guess that’s how you learn…</p>
<p>I cram with all year’s notes, I took really good notes the whole year… plus my textbook came with a smaller review book with lots of practice tests, I’ve been using that… it’s just the things we learned during the middle of the year. I can’t remember anything, lol. (: This is my first AP test, so hopefully it will help me prepare for next year’s multiple tests…</p>
<p>Can we use calculator and formula sheet for multiple choice and free response sections ?</p>
<p>You can use for calculators for the entire test but the formula sheet is only for the FRQ.</p>
<p>anyone know how to do this problem
The lengths of individual shellfish in a population of 10,000 selfish are approximately normally distributed with mean 10 centimeters and standard deviation 0.2 centimeter. Which of the following is the shortest interval that contains approximately 4,000 shellfish lengths?
A)0 cm to 9.949cm
B) 9.744cm to 10 cm
C) 9.744cm to 10.236cm
D) 9.895cm to 10.105cm
E) 9.9280cm to 10.080cm</p>
<p>This is from the 2002 test, and it’s number 10, the answer D.
I just don’t get why or how to do this question.</p>
<p>i can’t believe I just solved that problem… it’s incredibly hard, but I’ll try to explain it. </p>
<p>Ok, so the question is asking for the shortest interval that contains 4000 of the shellfish. 4000/10000 = .4. So we need to find the shortest interval that contains 40% of the shellfish. Since it’s normally distributed, we need to find the the z score (the negative and positive value) that contain 40% of the normal distribution, as shown in the following picture. </p>
<p><a href=“http://www4a.wolframalpha.com/Calculate/MSP/MSP84401a1b3f9g4e03fd0100004h1i1g232h6igc59?MSPStoreType=image/gif&s=8&w=300&h=188&cdf=RangeControl[/url]”>http://www4a.wolframalpha.com/Calculate/MSP/MSP84401a1b3f9g4e03fd0100004h1i1g232h6igc59?MSPStoreType=image/gif&s=8&w=300&h=188&cdf=RangeControl</a></p>
<p>The tail probabilities are equal to the white areas in that pic. To find it, just do (1-.4) / 2, and you get .3. invnorm(.3) yields a zscore of -.5244, which is our negative zscore value, or where the 40% “starts” per se. Our positive zscore value is the absolute value, which is .5244. If you want to check this, do normalcdf (-.5244, .5244), and you should get .4. </p>
<p>If you rearrange the z-score formula, you get z * stddev + mean = x.
.5244 * .2 + 10 = 10.10. Immediately, you realize that the only answer could be D… no other work has to be done. </p>
<p>i tried explaining it the best I could…</p>
<p>Ugh, I am so screwed for this test. My teacher literally has not taught us a single thing, so everything on the FRQs seems foreign to me.
I felt much, much, much more prepared going into the calculus exam this year.
Does anyone have a good cram sheet or something for me to “review” everything?</p>