Maths Methods (Exam 2): Discussion, Questions & Potential Solutions

[AlphaZero]

Finally finished the exam 2 provisional solutions!

Get them here: https://atarnotes.com/forum/index.php?topic=181368.msg1083392#msg1083392

[matthewmwps]

I honestly have no idea if i got marks for that question myself. I've kinda resigned myself to the fact i lost marks there.

My answer was:

"the population proportion has a less change of having a slow heart beat (0.142<0.1587)"

Although in my actual answer i did put the names, which i can't now because i've completely forgotten it.

[vox nihili]

Finally finished the exam 2 provisional solutions!

Get them here: https://atarnotes.com/forum/index.php?topic=181368.msg1083392#msg1083392

Promise I won't delete these ones.


Thanks so much for this contribution; they're fantastic.

[Siddharth Nichani]

any chance we could get the mark allocations for each question? (as in what each question was worth, not what information resulted in the mark)

[AlphaZero]

Promise I won't delete these ones.


Thanks so much for this contribution; they're fantastic.

No worries. I'll be back again tomorrow, and Monday, and my mate will be here for chem and physics

[AlphaZero]

any chance we could get the mark allocations for each question? (as in what each question was worth, not what information resulted in the mark)

I'll add the mark allocations tomorrow. I'm too tired at the moment.

[Sine]

any chance we could get the mark allocations for each question? (as in what each question was worth, not what information resulted in the mark)

Sure!

Mark Allocations

All 20 MCQs were worth 1 mark  (LOL) 

Question 1 - 13 marks
Q1a - 1 mark
Q1b - 1 mark
Q1c - 1 mark
Q1d - 2 marks
Q1e - 2 marks
Q1f - 1 mark
Q1g - 1 mark
Q1hi - 1 mark
Q1hii - 1 mark
Q1hiii - 2 marks

Question 2 - 10 marks
Q2a - 2 marks
Q2b - 2 marks
Q2c - 2 marks
Q2di - 2 marks
Q2dii - 2 marks

Question 3 - 11 marks
Q3a - 1 mark
Q3b - 1 mark
Q3c - 3 marks
Q3d - 1 mark
Q3e - 2 marks
Q3f - 3 marks

Question 4 - 16 marks
Q4a - 1 mark
Q4bi - 1 mark
Q4bii - 1 mark
Q4ci - 2 marks
Q4cii - 2 marks
Q4ciii - 2 marks
Q4di - 1 mark
Q4dii - 1 mark
Q4e - 2 marks
Q4f - 1 mark
Q4g - 2 marks

Question 5 - 10 marks
Q5a - 2 marks
Q5b - 1 mark
Q5c - 2 marks
Q5d - 1 mark
Q5e - 2 marks
Q5f - 1 mark
Q5g - 1 mark

[Globe]

Hey guys I’m kinda freaking out ah! For the probability questions that are worth like 1 mark... will it still be awarded if you just wrote the probability without like the Pr(whatever)=... surely for one mark having the right answer with the decimal places is okay

[tiffanylps09]

This is, unfortunately, also not likely to get the mark as you have misinterpreted the confidence interval - it doesn't mean that 95% of the population is necessarily inside that range.
If we took infinitely many samples, 95% of the Confidence Intervals constructed (provided they are all 95% CIs) would contain the actual population proportion (whilst 5% will not). This is effectively the reason why we can't compare the proportions from each town - we have the population proportion for Mathsland, but the sample proportion obtained for Statsland may not reflect the actual value (i.e. this particular CI may be one of the 5% that does not contain the actual population proportion). For these types of problems, it is imperative to keep in mind that the sample proportion is dependent on the sample obtained and is therefore a variable, where as the population proportion is constant

Hi for that same question, if i compared the sample sizes of the two towns do you think i might get a mark? Statsland had a sample size way bigger than Mathland..

[S200]

any chance we could get the mark allocations for each question? (as in what each question was worth, not what information resulted in the mark)

That was 100% given to you with the exam...
But yeah, Sine has the proper answer...

Also, gonna take this op to tell ya to just make one post rather then a few. Double posts just look messy.

You can respond to more than one person from one post...

[reebo]

I gave my answer to 3d in degrees and not radians, so gradient = 2.000.
The question didn't specify whether they wanted it in radians, do you think this will still be accepted?

[Lear]

I believe the angle was given in radians so you had to find the gradient using m=tan(theta) where theta is in radians.

[S200]

I gave my answer to 3d in degrees and not radians, so gradient = 2.000.
The question didn't specify whether they wanted it in radians, do you think this will still be accepted?

Wait... If 3d was the gradient question, it wasn't 2.00 degrees.
 

I subbed the provided value into the tan equation (as per Lear, above), giving me 0.035 as the gradient.

[Tadd12345]

I got absolutely destroyed by both methods exams, ended up with a 34 thanks to sweet sweet SAC scaling.
And in two years I'll be a doctor. *
One.exam.doesn't.change.your.life.

You'll be fine everyone.




*second humble brag, my mediocrity in methods didn't even stop me from landing in the top 10% of my Biomed cohort for maths. Seriously, one exam does not change your life.

you're my inspiration brother, I actually love you. And yeah hopefully my sac scaling will help me out, i'm rank 1 and probably got A+ in exam 1 on Wednesday, but  I got my actual ass handed to me Thursday methods exam 2. Like seriously, id be happy if I got 60-70%. In all my timed methods practice exams I never got below 80%. but this exam on the other hand was easily the craziest thing I ever had the misfortune to experience.

MOD EDIT: removed flippant reference to self-harm. If anyone reading this is struggling during exam time, please get help. https://www.lifeline.org.au/about-lifeline/contact-us

[Dais_Deorum]

you're my inspiration brother, I actually love you. And yeah hopefully my sac scaling will help me out, i'm rank 1 and probably got A+ in exam 1 on Wednesday, but  I got my actual ass handed to me Thursday methods exam 2. Like seriously, id be happy if I got 60-70%. In all my timed methods practice exams I never got below 80%. but this exam on the other hand was easily the craziest thing I ever had the misfortune to experience. I actually want to kill myself after that catastrophe

It's alright mate. I know it's hard to see now but you did the best you could, and besides, these exams as Vox mentioned mean f***all in the long run. Don't be too harsh on yourself, and you also have next year to improve. Try to get some rest !! (lol I say that and I have spesh p 1 in 8 hours and 20 mins Stay well!