Nanoha Posted May 6, 2011 Report Share Posted May 6, 2011 yeah I also hope for lower boundaries and that P2 and P3 will boost up the mark. And I need a 7 in maths, now I'm sacred I won't even get to my insurance uni. Reply Link to post Share on other sites More sharing options...
ceeN Posted May 6, 2011 Report Share Posted May 6, 2011 Anyone write TZ1?what do you guys think of it?I am TZ1, I found Paper 1 fine. The first 3 parts of the last question were taken from a past exam, and it made that question easier than usual. So I figured that question out. There were some tricky questions, but overall I found it fine. However, some of my classmates thought that this exam was pretty hard and very time consuming.Anyone else from TZ1?? Reply Link to post Share on other sites More sharing options...
Angad Sharma Posted May 7, 2011 Report Share Posted May 7, 2011 anyone have any idea what the overall grade boundary may be? i wanna know if it's still possible for me to get a 7.i think (wost-case) i'll get a 65/120 for paper 1 and 90/120 for paper 2.definitely the toughest math hl paper 1 ever. Reply Link to post Share on other sites More sharing options...
Lawliet Posted May 7, 2011 Report Share Posted May 7, 2011 I had TZ2 and thought it was manageable. Guess I agree that the questions were rather tough, but not undoable. It was just too much for 2 hours... Didn't finish everything I would have liked to, even though I am rather good at math... Hm...Anyways, how did you do that weird probability question with the broken DVD's? Started it a bit, but then I got mixed up and decided to skip it for now. But in the end I didn't have enough time to revisit it..Did the DVD question have anything to do with Binomial distrubition? But then I stumped, because I thought that the numbers were too nasty for a non-calculator paper... Was there a trick to it? Reply Link to post Share on other sites More sharing options...
MajorMajor Posted May 7, 2011 Report Share Posted May 7, 2011 I think the broken DVD questions was to be cracked with combinations. I think I didn't get it right, though, not enough time... I just wrote down some random combinations, hoping for 1-2 points for the proper idea. Reply Link to post Share on other sites More sharing options...
ocfx Posted May 7, 2011 Report Share Posted May 7, 2011 I had TZ2 and thought it was manageable. Guess I agree that the questions were rather tough, but not undoable. It was just too much for 2 hours... Didn't finish everything I would have liked to, even though I am rather good at math... Hm...Anyways, how did you do that weird probability question with the broken DVD's? Started it a bit, but then I got mixed up and decided to skip it for now. But in the end I didn't have enough time to revisit it..Did the DVD question have anything to do with Binomial distrubition? But then I stumped, because I thought that the numbers were too nasty for a non-calculator paper... Was there a trick to it?Don't think it had anything to do with binomial, because there was no replacement and yes it should have been done with combinations, but didn't get it in the exam though . It actually has its own name it's called the hyper-geometric distribution, but it's essentially just conditional probability with combinations (you learn this stuff when your revising for stat and prob paper 3) Reply Link to post Share on other sites More sharing options...
Slovakov Posted May 7, 2011 Report Share Posted May 7, 2011 Well, I came up with a thought that combinations vould be useful there, but I thought it would take too much time to calculate it without my GDC, so I left it Reply Link to post Share on other sites More sharing options...
Snoopchicken Posted May 7, 2011 Report Share Posted May 7, 2011 Yeah, part (a) of the disk question was hyper-geometric distribution, and part (b) was negative binomial distribution. I did part (b) correct, but for part (a), I accidentally mixed 2 parameters up in the calculations. Does anyone know how many points (out of 4) I will lose for that? I was so annoyed when I finished because it's such an easy question, and I still failed to do it. Oh well Reply Link to post Share on other sites More sharing options...
Lawliet Posted May 7, 2011 Report Share Posted May 7, 2011 Don't think it had anything to do with binomial, because there was no replacement and yes it should have been done with combinations, but didn't get it in the exam though . It actually has its own name it's called the hyper-geometric distribution, but it's essentially just conditional probability with combinations (you learn this stuff when your revising for stat and prob paper 3) Now that you say say, I remember.. I did the statistics option.. Geez, such a nasty thing to identify that it's choice without replacement.. But oh well, statistics has never been my strong part..Now that I think about it, is hyper-geometric distribution in the Maths HL core syllabus? Or would they consider it barely acceptable, because as you said it's essentially a complicated form of conditions with combinations.. But come on, something like that for ~6 points?! Reply Link to post Share on other sites More sharing options...
Guest Red XII Posted May 8, 2011 Report Share Posted May 8, 2011 I did TZ1 and this was definitely the hardest Paper 1 I've taken. I filled in probably around half of the test that I'm actually confident about, plus some partial credit on the problems I wasn't able to finish. Hopefully the boundaries are low enough that that'll turn out to be a 5 or a 6. I think I made up some of my losses on P2 and I'm studying for P3 to make up some more there. Reply Link to post Share on other sites More sharing options...
lm10love Posted May 9, 2011 Report Share Posted May 9, 2011 When it comes to the boundaries supposedly theyre going to make it even lower than last year, like around 60% a 7. My physics teacher, also ib coordinator, told me this and that even though we all thought we messed it up and **** we should still come out with decent grades. im praying like mad that this will happen cause that was indeed the hardest papers ive ever seen and i did all of the past papers since 2007. I really hope that happens. It was much harder than May 2010 paper. Reply Link to post Share on other sites More sharing options...
dogmatichurricane Posted May 11, 2011 Report Share Posted May 11, 2011 Uhh for the xf(x) question that everyone's complaining about......couldn't you just substitute values of x and multiply it with the f(x) value you have from the original graph for different values of x?So I had a graph that was below the y-axis when x<0, passed through the origin when x=0 (since xf(x) = 0 when x = 0) and then went above the y-axis to simulate the original curve when x>0 only it rose much faster. Reply Link to post Share on other sites More sharing options...
iB dweeb Posted May 11, 2011 Report Share Posted May 11, 2011 ***ed up the fun of maths...the papers were a tough nut to crack! Reply Link to post Share on other sites More sharing options...
Arun Cage Posted May 11, 2011 Report Share Posted May 11, 2011 Time was definitely an issue and the tough questions just made it virtually impossible to finish.I remember leaving the last couple parts of the final question.Yeah, I expect (I hope) the level 7 boundary will be somewhere around the 80 mark for this paper.Any guesses for the overall boundaries? Reply Link to post Share on other sites More sharing options...
Convergence Posted May 13, 2011 Report Share Posted May 13, 2011 Uhh for the xf(x) question that everyone's complaining about......couldn't you just substitute values of x and multiply it with the f(x) value you have from the original graph for different values of x?So I had a graph that was below the y-axis when x<0, passed through the origin when x=0 (since xf(x) = 0 when x = 0) and then went above the y-axis to simulate the original curve when x>0 only it rose much faster.Yeah that was exactly what I did, seemed pretty simple to me. Reply Link to post Share on other sites More sharing options...
Arun Cage Posted May 15, 2011 Report Share Posted May 15, 2011 Uhh for the xf(x) question that everyone's complaining about......couldn't you just substitute values of x and multiply it with the f(x) value you have from the original graph for different values of x?So I had a graph that was below the y-axis when x<0, passed through the origin when x=0 (since xf(x) = 0 when x = 0) and then went above the y-axis to simulate the original curve when x>0 only it rose much faster.Yeah that was exactly what I did, seemed pretty simple to me.Took the words right out of my mouth (or keyboard, perhaps): "That was exactly what I did." Reply Link to post Share on other sites More sharing options...
praachi Posted June 8, 2011 Report Share Posted June 8, 2011 Is therer ANYBODY here, who could possibly give me a copy of the May 2011 paper (or tell me how to get hold of it? ) I would really really really appreciate it as I am in dire need for the paper. Thanks a million! Reply Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.