WHO HATED THE CRICKET QUESTION?!?!?! i was absolutely stumped :P
My God I wish I could downvote this, that was terrible 😂
What was the question? I haven't seen any of the paper yet
(I'm assuming stumped was a pun lmao)
haha ;) cricket insectwow good memory how did you remember that?? the answer was 29 that's all I know ahahah wish I knew that in the exam though
nah it was about a scientist measuring the relationship between temperature and amount of cricket chirps...gave us a box plot of temperatures over 20 days and told us there were 684 cricket chirps in total; gave mean temperature...
and then the least squares regression line with (where y=chirps and x=temp)
blah di blah (a lot of information my poor brain!)
then we had to figure out amount of chirps expected on a 19C day :P i was like um yeh well NOPE
how tf were we supposed to answer that cricket question though...and apparently standard had the same one?? ugh I'm so mad at my school for never teaching us a thing about regression lines, everyone in my year was absolutely stumped with that question and I'm mad at myself for not doing enough past papers lol
...and apparently standard had the same one??
I heard there was a 23 mark cross over with the standard paper. It would be interesting to know which questions.yeah I heard something similar. I think it must've been the crickets one, the annuities one and the venn diagrams/probability questions. haven't done a venn diagram since like year 10 so had a mini heart attack when I saw that one lol
yeah I heard something similar. I think it must've been the crickets one, the annuities one and the venn diagrams/probability questions. haven't done a venn diagram since like year 10 so had a mini heart attack when I saw that one lol
I heard there was a 23 mark cross over with the standard paper. It would be interesting to know which questions.
Some late night solutions to the whole paper.
These are awesome, thank you!!Oh dear haha.
Just with Q27 (the crickets one) you've written =29.036... --> Hence 21 chirps...
Should it not also be 29?
I thought 8 and 10 were very hard, I was basically making an educated guess on both of them.what was the answer for 10 multiple choice?
what was the answer for 10 multiple choice?I will get to that.
reading these answers feels bad manIf they were silly mistakes I imagine you'd still get a reasonable amount of partial marks for your attempts. They shouldn't punish you that heavily if you showed reasonable understanding, even if there were errors along the way.
made sooooo many dumb errors I genuinely don't know if i even passed this paper. ugh I feel like i've completely jeopardised my atar with this one stupid exam
Q10. Should be D, i think.The stationary point at \(x=3\) was already located. There is nothing to convince me of here.
h(x) = f(g(x))
Examining around x = 3:
h(x) = f(g(2.9))
h(x) = ~ f(0.1)
h(x) = ~ 1.81
h(x) = f(g(3))
h(x) = ~ f(0)
h(x) = ~ 1.8
h(x) = f(g(3.1))
h(x) = ~ f(0.1)
h(x) = ~ 1.81
Clearly, there is a minimum point :-)
Therefore answer is D, not C. Other two max stationary points occur when ~f(0.8). i.e. we need g(x) to be 0.8 in order to get f(g(x)) to become f(0.8).
g(x) = 0.8 at 2 places. Therefore two stat points.
If you're still not convinced, try using desmos to experiment:
g(x) = 0.5(x-3)^2
f(x) = 2e^-(0.7x-0.5)^2
h(x) = f(g(x))