PXSS Posted May 6, 2010 Report Share Posted May 6, 2010 I did TZ2 n tht paper came straight from hell!All the other past papers i have done were extremely easy compared to this 1...all i can hope for now is a 3 and with luck a 4 if i do well on the other 2 =/wouldve loved to get any of the 2009 papers... but oh well... Reply Link to post Share on other sites More sharing options...
soadquake981 Posted May 6, 2010 Report Share Posted May 6, 2010 At the required summation you needed to make the equation quadratic and then split the summation into 3 smaller summations. Σχ^2 +24* Σχ + Σ(something dont remember) and by using the formula Σχ/n=mean and Var=σ^2=Σχ^2/n - mean (formula book page 5 the two formulas under the Sample statistics) and then by putting the number in it is solved.Ah, well that explains why I didn't understand it, haha! 1 Reply Link to post Share on other sites More sharing options...
Joanna Posted May 7, 2010 Report Share Posted May 7, 2010 Well the one with the die i later realised it was geometric progression. first term is 1/6 second term is (5/6)(5/6)(1/6) third term (1/6)(5/6)^4 .... and you do sum to infinityThe one with the mean and standard deviation i managed it it was sample statistics. Its true it was a dificult paper..Ah, yeah, I realized it was a geometric series later too. I should have gotten that one... I've done so many like it before! During the exam, I multiplied everything together instead of adding the terms, so it didn't work.What did you do for the statistics one? I got to the point where 90=sigma(with all the parameters)... but I couldn't figure out how the -12 relates to it.Oh god.. totally did not get it then... Ummm yesss I think they put too many questions on graphs?! Which I did nooot study for because I've changed schools so many times that I like never learned graphs, which is supposed to be easy, so I just studied for harder things that weren't even on the stupid test. No demoivres theorem, hardly any calculus and that vectors questions, I like screwed it up.. Ugghhhh and todays paper did not go anyyy better... well just a little bit.. I don't understand, I don't feel disappointed in myself because I know I studied and I learned a lot, do you think the questions were doable in the short amount of time we have for that test??? Reply Link to post Share on other sites More sharing options...
Joanna Posted May 7, 2010 Report Share Posted May 7, 2010 Paper 1 was challenging.Paper 2 was very good. Definitely made up for Paper 1.crap... you thought paper two was very goood??? =/ hmmm. nott me Reply Link to post Share on other sites More sharing options...
hanniexx Posted May 7, 2010 Report Share Posted May 7, 2010 Paper 1 was challenging.Paper 2 was very good. Definitely made up for Paper 1.crap... you thought paper two was very goood??? =/ hmmm. nott meSame. I found paper 2 in some aspects a little worse.I've heard quite a few mixed response for paper 2...that will probably separate out the boundaries I guess...Also, with the normal distribution question (TZ2), I got a little confused with the wording. Because it said 'after' 21 days. I didn't know if that meant >21 of <21...that was slightly confusing for me. Was the '0.2' area to the right or left?Ack, I really need a 5 for this Reply Link to post Share on other sites More sharing options...
IBer_101 Posted May 7, 2010 Report Share Posted May 7, 2010 Paper 1 was challenging.Paper 2 was very good. Definitely made up for Paper 1.crap... you thought paper two was very goood??? =/ hmmm. nott meSame. I found paper 2 in some aspects a little worse.I've heard quite a few mixed response for paper 2...that will probably separate out the boundaries I guess...Also, with the normal distribution question (TZ2), I got a little confused with the wording. Because it said 'after' 21 days. I didn't know if that meant >21 of <21...that was slightly confusing for me. Was the '0.2' area to the right or left?Ack, I really need a 5 for this 0.2 was to the right, since the mean was 15 or something, so it can't possibly be to the left, coz then it would have to be more than 0.5 Reply Link to post Share on other sites More sharing options...
master135 Posted May 7, 2010 Report Share Posted May 7, 2010 (edited) For some reason IB seems to be making the exams much harder for Math HL since May 09 - me and my IB class had the exact same thoughts for paper 1 last year. Expect the Grade boundary to be around 75-100 overall for a 7. Edited May 7, 2010 by master135 Reply Link to post Share on other sites More sharing options...
DJ CAS Posted May 7, 2010 Report Share Posted May 7, 2010 You can't talk about paper 2 just yet, hasn't been 24 hours I didn't say anything about the stuff in it though. I just said its overall difficulty. Reply Link to post Share on other sites More sharing options...
DJ CAS Posted May 7, 2010 Report Share Posted May 7, 2010 For some reason IB seems to be making the exams much harder for Math HL since May 09 - me and my IB class had the exact same thoughts for paper 1 last year. Expect the Grade boundary to be around 75-100 overall for a 7.I agree. It's definitely been harder than before. I hope that the grade boundaries are low. Reply Link to post Share on other sites More sharing options...
sweetnsimple786 Posted May 7, 2010 Report Share Posted May 7, 2010 Guys I'm so confused. This is the English A1 HL Paper 1 thread, right?I see discussion about A1 SL, B and even math... I keep checking the tab header to make sure I'm not hallucinating Please let's try to keep math discussions in math discussion threads if they're going to span multiple posts Reply Link to post Share on other sites More sharing options...
IBer_101 Posted May 8, 2010 Report Share Posted May 8, 2010 Guys I'm so confused. This is the English A1 HL Paper 1 thread, right?I see discussion about A1 SL, B and even math... I keep checking the tab header to make sure I'm not hallucinating Please let's try to keep math discussions in math discussion threads if they're going to span multiple posts The Math HL P1 topic disappeared a couple days ago and here it is .The topic itself is gone but the posts that we posted there are right here.I have no idea how this happened, but I'm sure it's unintended. Sorry mod Can someone fix this? 1 Reply Link to post Share on other sites More sharing options...
sweetnsimple786 Posted June 3, 2010 Report Share Posted June 3, 2010 Strange. Thanks, IBer! I think I sorted the posts out. Better late than never...? =) 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.