VCE Methods Question Thread!

[halo]

GUYS HELP.

What are people writing in for the two exams? Pen or pencil? I'm so conflicted

I'm going with pencil because I tend to make a lot of mistakes and usually like to neaten up my working once I'm done by erasing and fixing up notation etc. I've also never used pen for maths. What have you been doing prac exams with? I'd say just use what you've  been using all along so as to not add any further stress to yourself during the exam. Good luck!

[larissaaa_]

I'm going with pencil because I tend to make a lot of mistakes and usually like to neaten up my working once I'm done by erasing and fixing up notation etc. I've also never used pen for maths. What have you been doing prac exams with? I'd say just use what you've  been using all along so as to not add any further stress to yourself during the exam. Good luck!

I've used pencil for all my SACs and practice exams, I find it so much easier and less stressful because I know I can make mistakes and fix them up. But I'm scared it won't scan or it'll smudge out? VCAA gives us no indication of what they want like they usually do for the other science exams so  Anyway, I think I'll just use pencil. Thankyou! Good luck to you too

[bedigursimran]

Hey guys, I need help with question 7b from the sample exam 1.

I don't know what it's even asking me, what do I do with the confidence interval? Thanks so much 

[larissaaa_]

Hey guys, I need help with question 7b from the sample exam 1.

I don't know what it's even asking me, what do I do with the confidence interval? Thanks so much 

You don't do anything with the confidence interval, it's just there for the context of the question. What you would do in this case is, there is a 1/23 chance of the confidence interval not containing p, and in a sample of 2 confidence intervals we want to find the probability of one of them not containing p. So that would be Pr(SF) + Pr(FS) given S = success = not containing p = 1/23 and F = failure = conf. interval does contain p.

Answers are here if you need: http://www.itute.com/wp-content/uploads/2016-VCAA-Mathematical-Methods-Sample-v2-April-Exam-1-Solutions.pdf.

I got stuck on this question too when I saw it, the wording threw me off but hope that helped

[Callum@1373]

I can usually score full marks on the exam 1 in 23-25 min, what (past students) do you recommend I do in  the remainder of the time? Some say to just go over your wowking and some people say to try do the exam twice using different methods to verify your answer, but there's no more space in the exam to do that?

[larissaaa_]

Probably too late to be asking this but I'm just having one of those blank out moments and praying someone replies before tomorrow morning. How do we antidifferentiate an equation raised to a negative power? Say: (b-ax)^-r, is it [1/-a x (r+1)] x (b-ax)^r+1 OR is the beginning 1/a x (r+1)? As in the negative in front of the a doesn't get taken out as well or it does? Hope that made sense, I'm in stress mode and don't know what to do.

[has400]

Probably too late to be asking this but I'm just having one of those blank out moments and praying someone replies before tomorrow morning. How do we antidifferentiate an equation raised to a negative power? Say: (b-ax)^-r, is it [1/-a x (r+1)] x (b-ax)^r+1 OR is the beginning 1/a x (r+1)? As in the negative in front of the a doesn't get taken out as well or it does? Hope that made sense, I'm in stress mode and don't know what to do.

You do it the same was as you do to a positive power

[larissaaa_]

You do it the same was as you do to a positive power

Just realized my question was worded so weirdly soz. For the image you attached, say a was a negative number. Does that negative come out as well when we multiply it with r+1? Or does only the positive value of a come out?

[bedigursimran]

Guys. When finding integrals or anti derivatives, can they ever penalise you of putting +c? As apparently when it says an anti derivative you are not supposed to put the + c.

[FallingStar]

Guys. When finding integrals or anti derivatives, can they ever penalise you of putting +c? As apparently when it says an anti derivative you are not supposed to put the + c.

As far as I know, you put +c when it say "find the anit-derivative" ad you don't put it if it says "find an anti-derivative" because that implies one anti-derivative, and the normal derivative without the +c is actually +0. But hopefully someone will correct me (this last minute).

[sweetcheeks]

Can I please have some help with these two multiple choice probability questions.

[sayy11]

Can I please have some help with these two multiple choice probability questions.

Q8 is no longer relevant to the study design, with Q9, you need to use the binomial theorem and conditional probability. Pr(x=15Ix greater or equal to 12)
Calculator input Binompdf(20, 0.7, 15) and then divide that answer by Binomcdf(20, 0.7, 12, 15)

[sayy11]

Would someone be able to explain what the question means when it says X'P' ?

[tanvikumar]

Guys. When finding integrals or anti derivatives, can they ever penalise you of putting +c? As apparently when it says an anti derivative you are not supposed to put the + c.

No, I believe you wouldn't get penalized for it. I did methods last year and from what I learnt they only penalize you if they ask for 'the anti derivative' and you don't add a '+c' at the end. If it asks for ' an anti derivative', either should be acceptable but I always wrote '+c' at the end regardless. I hope this helps 

[waterangel82]

Hi guys,

how did u all find 2016 VCAA Exam 1 today? Personally, I thought there was going to be a lot of statistics, but there wasn't really any.

Personally though, I found the exam quite good. The last question required a bit of logical reasoning, but that's pretty much it. Don't know if they'll award me full marks if I do the definite integrals without the extra brackets on the outside as a whole, but my answers were correct. I guess they didn't really specify this in the textbooks and they also did the same way as I did in the last question of 2013 Exam 1 .... I guess I'll just have to see....