VCE General & Further Maths Question Thread!

[galaxy21]

that cleared some misunderstandings, neap (or some other companies, can't remember) did the full "7700" for regression, got me confused

Ah I hate it when the companies give you answers that VCAA would consider wrong! Super confusing 

always listen to vcaa 

100%. Examiner reports are the greatest thing they could have given us (apart from the answers to this years exam, of course  )

[melaniethephan]

Can anyone please explain the answer to part c of this question? VCAA said the answer is 8 trucks. It's from VCAA 2017 NHT Further Exam Networks Module Q3. Thank you (:

[galaxy21]

Can anyone explain the answer to part c of this question? VCAA said the answer is 8 trucks. It's from VCAA 2017 NHT Further Exam Networks Module Q3. Thank you (:

Basically for this, you just need to find the path from the entrance to the exit that will allow for the maximum number of trucks to pass through. They all have to follow each other, so if must be one path. Its similar to a max flow question, just with one path only.
Looking at the graph, the path that would allow for the largest number of trucks to pass through would be the path highlighted yellow in the attached document. Although some streets allow more than 8 trucks (e.g. two allow 9), there is one that allows only 8, and therefore this is the maximum number that will be able to pass through each day.

[spursy]

if the question says-

Describe the trend, if any, over time

do we have to include irregular fluctuations and all that other stuff or do we only just say if it's increasing or decreasing?

[melaniethephan]

Basically for this, you just need to find the path from the entrance to the exit that will allow for the maximum number of trucks to pass through. They all have to follow each other, so if must be one path. Its similar to a max flow question, just with one path only.
Looking at the graph, the path that would allow for the largest number of trucks to pass through would be the path highlighted yellow in the attached document. Although some streets allow more than 8 trucks (e.g. two allow 9), there is one that allows only 8, and therefore this is the maximum number that will be able to pass through each day.

THANK YOU SO MUCH YOU ARE A LIFE SAVER!!!! Thank you for replying so fast..

[galaxy21]

if the question says-

Describe the trend, if any, over time

do we have to include irregular fluctuations and all that other stuff or do we only just say if it's increasing or decreasing?

After looking through past exam 2's up to 2013, I haven't been able to find any questions asking this. However, in the 2017 NHT Exam 2, question 3 a of the data analysis section. According to the answers, all you need to say is increasing trend, as you suggested.
If it asks for the pattern of a time series plot, I would say this is when you use the irregular fluctuations/cyclic variation/seasonality etc. terminology.

[anne198]

When asked for shape of distribution do you include if there is outliers or not?

[userrrname]

Hey can anyone help me with this 2007 exam 2 question. I cant seem to get 7.3...

b. Another store offers the same $7000 office furniture for $500 deposit and 36 monthly instalments of
$220.
 ii. Calculate the annual flat rate of interest charged by this store.
 Write your answer as a percentage correct to one decimal place

[userrrname]

When asked for shape of distribution do you include if there is outliers or not?

Yes you do and I think you even have to mention the number of outliers for things like boxplots e.g "with two outliers"

[PhoenixxFire]

Hey can anyone help me with this 2007 exam 2 question. I cant seem to get 7.3...

b. Another store offers the same $7000 office furniture for $500 deposit and 36 monthly instalments of
$220.
 ii. Calculate the annual flat rate of interest charged by this store.
 Write your answer as a percentage correct to one decimal place

7000-500 = 6500

220 X 36 = 7920

7920 - 6500 = 1420

1420/3 = 473.333333

473.333333.../6500 X 100 = 7.28%

Explanation:
7000-500 = 6500 (you need to subtract the deposit because you don't pay interest on it)

220 X 36 = 7920 (this is the total amount you actually pay)

7920 - 6500 = 1420 (this is the interest paid)

1420/3 = 473.333333 (this is the interest for 1 year. 36months = 3 years)

473.333333.../6500 X 100 = 7.28%

[vceme]

using reading time for solving questions or actually reading  not sure what to do considering last time, i ran out of time to check all modules for exam 1 

[PhoenixxFire]

using reading time for solving questions or actually reading  not sure what to do considering last time, i ran out of time to check all modules for exam 1 

I use it to make note of all the details that normally trip me up - so noting whether an interest rate is monthly or annual or whatever. Just making note of easily avoidable errors so that I don't actually make them.

[vceme]

I use it to make note of all the details that normally trip me up - so noting whether an interest rate is monthly or annual or whatever. Just making note of easily avoidable errors so that I don't actually make them.

yeah thats what i tried to do for exam 1 but i think my paranoia that i was making a silly mistake made me lose so much time....

Also:
Everyone please make sure your CAS is set to just FLOAT (it's caused people to lose marks because their cas setting aren't right)

[galaxy21]

using reading time for solving questions or actually reading  not sure what to do considering last time, i ran out of time to check all modules for exam 1 

Yeah like PhoenixxFire said, definitely use reading time to try and comprehend questions and pinpoint anything you think you are going to have trouble with. Get an idea of what you have to come so you can plan out your time basically (e.g. if you notice that the financial area has quite a few questions that you took a long time with in practice exams, try to allocate a little longer to this and move through faster with other sections that you could do easily.)
Don't bother trying to solve it yet, because you will just have to try and remember it. Only do this at the end if you have read through it all at least once and comprehended it all, and then just do it for the basic questions, like median and stuff, because you don't have your calculator.

Edit: this is just what I try to do - if you really want to start solving to potentially save a minute or two, then go for it!

Also:
Everyone please make sure your CAS is set to just FLOAT (it's caused people to lose marks because their cas setting aren't right)

OMG yes the most incredible advice. I will never do this wrong again after it lost me a mark in one SAC - that I would otherwise have gotten 100% on  .

Good luck today everyone!

[Vri123]

Could someone predict my study score?
Sacs: 87% (defs not rank one)
Exam one: 40/40
Exam two:58/60