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

[Freddie Hg]

Was 3C to the nearest whole number or was it alright to leave it in 550-900/π sqr units?

i dont get your 4 dii

[integrationbyrecognition]

man under normal conditions i would smash out exam 1 and exam 2s with relative ease. scoring easily in the above 45 range. under timed conditions, im a complete idiot. i think your perception is skewed due to the latter. (not to be rude, im sure your smarter than me) exam 1 was in my opinion the hardest exam 1 in any vcaa exam, same with exam 2 2017. i hope your ruminative state post exams is just you being a perfectionist and that you aced both if not exam 2 in methods. even if you didnt. it doesnt matter

I didn't come anywhere nearing exam 1 and 2, what made you think I did? This year's exam 1 was definitely the hardest exam 1 ever, but imo this year's exam 2 was also the hardest, and alot harder than last years exam 2

[jazzycab]

i dont get your 4 dii

I didn't check this - neither do I, \(550-\frac{900}{\pi}\approx263.521\)...

[Freddie Hg]

I didn't come anywhere nearing exam 1 and 2, what made you think I did? This year's exam 1 was definitely the hardest exam 1 ever, but imo this year's exam 2 was also the hardest, and alot harder than last years exam 2

to each their own. idk, we will have to wait for the grade distributions. after all a good maths student only listens to the numbers (cold hard statistics).

[ajs13]

I'm just writing up question 5 now. I'm sorry this is taking so long. I had a 3-hour Engineering exam this morning and so I had to take a break. Solutions to Section B will be up soon

all good! will those be coming out tonight or tomo? cause otherwise I'm off to bed

[Dais_Deorum]

I didn't check this - neither do I, \(550-\frac{900}{\pi}\approx263.521\)...

Ik its not the required form, but do you think they would accept it? So annoying to think a mark would be lost there

[integrationbyrecognition]

to each their own. idk, we will have to wait for the grade distributions. after all a good maths student only listens to the numbers (cold hard statistics).

I think I'm the only one who found last years exam 2 easier than today's. Oh well

[jazzycab]

Ik its not the required form, but do you think they would accept it? So annoying to think a mark would be lost there

Not if I have the correct answer as the value is different to what I got

[ajs13]

\Removed request for copyrighted material made in spite of several warnings on this thread and others not to request the exam

[Lear]

4dii - Would it be sufficient to compare the proportions of both towns for the mark?

[crawlingvines]

Reading through the solutions that have been posted so far has made me feel a lot better honestly. I don't even wanna begin to articulate the grief I felt walking out of the exam room after having left 3 questions on the last page blank. My time management for exam 2 went down the drain the minute I spent 5 mins too long on the multi section. C'est la vie

[undefined]

4dii - Would it be sufficient to compare the proportions of both towns for the mark?

I said 95% of the proportions of the statsville people were between (a,b) (i forgot the values) and the mathsland (or whatever it was called) population proportion is greater than that interval. Not sure if I'd get a mark for my response.

[jazzycab]

4dii - Would it be sufficient to compare the proportions of both towns for the mark?

I wouldn't suggest so as, even if two population proportions are different, this may not indicate statistical significance (however, if a proportion is outside of a specified Confidence Interval, it could be considered statistically significant).

[S200]

Reading through the solutions that have been posted so far has made me feel a lot better honestly. I don't even wanna begin to articulate the grief I felt walking out of the exam room after having left 3 questions on the last page blank. My time management for exam 2 went down the drain the minute I spent 5 mins too long on the multi section. C'est la vie

Lol. You only left 3 questions?
Cest la ******* double vie....

I left the all but one part of question 4, 'cause I be like "Probability is my strength, what need I fear?"... Except limited time, etc...

[jazzycab]

I said 95% of the proportions of the statsville people were between (a,b) (i forgot the values) and the mathsland (or whatever it was called) population proportion is greater than that interval. Not sure if I'd get a mark for my response.

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