# rinik

Members

57

19 Good

• Gender
Male
• Exams
May 2014
• Country
Macedonia

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1. ## HL MATH TEXTBOOK RECOMMENDATIONS

Pearson or IBID I have all the textbooks you mentioned and the Cambridge and H&H textbooks. I feel that the Pearson one is the best. It has questions exactly like the ones on the exams. It has info and help on the investigation. In my opinion it follows the syllabus better than the rest of the textbooks.
2. ## Summer Math HL Study Group

I am done with math HL but it would be fun to practice with you guys I sent a request.
3. ## What calculator is best suitable for Maths HL

I used the TI-84. It's all you will need for the exams. I would buy nspire cx for something like a portfolio or a project. However you can find computer software that will be a lot more helpful than a gdc for that sort of stuff. So my advice would be to not waste the money if you don't have it. During your exam you will use your calculator to sketch a graph, find zeros, find max min, solve problems with probability distribution and solve some integrals. The TI-84 is more than capable at doing that and it's a lot easier to use than some older models.
4. ## Math HL paper 3 sets, relations and groups

Thank god I am not the only one
5. ## Math HL Paper 2 TZ2

I am expecting somewhere around 90 marks. I did not find it easy. However my definition of easy is scoring above 105 marks. I also felt that it was longer than previous papers.
6. ## Poisson Distribution Question

a) In T minutes there will be T/4 cars and hence the parameter you use is 0.25T P(X<=3)= P(0)+P(1)+P(2)+P(3)=0.6 Substitute 0.25T as the parameter in the equation and solve using a gdc. for example P(0)= (0.25T)^0*e^(-0.25T)/0! do this for all of the probabilities and you get an equation with one unknown, T b) A ferry can carry a max of 3 cars. That means that a total of 6 can arrive because if more arrive than it will take another 10 minutes to transport all of the cars. This means that at least 3 have to arrive in the first 10 minutes because if 4 or more cars arrive in the second 10 minu
7. ## Math EE on Stats and Medicine

Thanks alot of this answer- i think i found out what i need to do. Just out of curiosity, which topic did you do yours on? Calculating the perimeter of an ellipse ( arc length of an ellipse). The main part of the essay focused on explaining and giving proof for the method. The last part of the essay was using the result in real life ( this was the reason why I started the essay). I had to teach my self about the properties of an ellipse, parametric equations of an ellipse, arc length of curves, finding the arch length by using the parametric equations, extend my knowledge of the binomial theo
8. ## Math EE on Stats and Medicine

You don't know what you want. I am not trying to be mean! Sit down and think about what you want to achieve or present with your essay. Medicine is a large field and all the topics you mentioned above are also very broad. Try to define a few research questions and after that try to think of a way to approach those questions. Ask people here or do some research. 4000 words might seem a lot but you will hit the limit very fast if you don't focus on one single thing. I did a math EE however it's still has not been graded. During the first month I was basically doing the same thing as you. Searchi
9. ## IB HL Specimen Paper for 2014 Syllabus

You realize that a 42% from paper 1 (20%) and 2 (30%), 30% from the IA (30%) and 15% from paper 3 (20%) means 42%*20%+42%*30%+30%*30%+15%*20%=33% (a 3) Instead of 42%+15%+15%=72%? (And a 7 in paper 3 of the sets relations and groups option is actually 42/60 which is 70% or 14% weighted) You have to get an average of 72% to get a 7 (or a sum of the weighted percentages) instead of a sum of 72% in all papers for the unweighted percentage. It's possible that I interpreted your post wrong though, if that's the case I'm sorry, but it does seem strange that you said and which caused my (probably t
10. ## IB HL Specimen Paper for 2014 Syllabus

Stronger candidates might have problems with the 8th, 9th, 11th under a) and the 13th question in my opinion. This all depends on the individual and I don't think that a candidate that is aiming for a 7 will fail to get any marks in these questions ( since you failed to solve 2 questions). Even if you fail to gain any marks in them you will end up with 84 marks out of 120. This is 70% of the entire paper and 21% for the final grade. The paper is definitely harder than usual. I would say that it's somewhere around may 2011 TZ1 HLP1 difficulty. I feel that the specimen paper is a little harder .
11. ## Will I get penalized for not giving my answers to 3 significant figures on probability questions

My main concern is when I am working with binomial, Poisson and normal distribution. Sometimes( only twice out of a lot of problems solved) rounding a number to 3 significant figures might produce an incorrect value on my calculator. Will it be fine if I work with more significant figures during the entire question but give my final answer to 3 significant figures? I know that this is a silly question but my school never covered this and I don't want to lose accuracy marks.
12. ## Will This kind of mistake cause me to loose a grade in my EE

I forgot to put pi/2 in there. Everything continues perfectly and the researched question is answered. Basically this has no effect on the rest of the essay it might confuse someone because it is missing. I feel a little better now. Thanks guys I hope the examiner misses it or at least takes it easy on me
13. ## Will This kind of mistake cause me to loose a grade in my EE

In the case that the examiner thinks that this is a major mistake. How much do you think it will cost me?
14. ## Will This kind of mistake cause me to loose a grade in my EE

I took a math EE and I already submitted it to my coordinator about a month ago. For some reason I decided to read it again and I found 2 mistakes. I wrote km^7 instead of km^2 and There was an equation where I had to factor out pi/2 from 3 terms but forgot to multiply one of them with it in the previous equation. I am really worried because I am evaluating the arch length of an ellipse. This is beyond that options and further maths. I have read in the criteria that we should not try to tackle mathematics we can not understand. I am worried that it may seem like that to the examiner because