VCE General & Further Maths Question Thread!

[galaxy21]

Hi.
So firstly, is this question from the 2014 Exam 2 still relevant to the study design, and if so, is there any shortcut to adding up the total amount other than just calculating each year and adding each value together separately?
Thanks!

[Lear]

Technically it’s simply a recurrence relation that requires you to make a spread sheet and observe when the area exceeds 4. But VCAA does not (or has not rather) ask questions like those in the new study design. They primarily connect recursion to financial modelling. I found the number patterns module to be a waste of time in older exams.

[vceme]

hey everyone,
i've been doing exams lately and for the first page on exam 2 with the typical mode, range, median, do you include the units provided in the question? sometimes vcaa doesn't put units on their answers and sometimes they do so someone please help!!
also do residuals include units because i'm currently marking a NHT exam 2017 exam, and vcaa has written the answer to be "-18.9%" (the unit of the variable is %). i understood residual values to be just the difference between the actual value and predicted value.
thank you in advance!! 

[vceme]

NHT EXAM 2, Q2F
Can someone please explain to me why the answer is 84. The answer I got was 82.

To my understanding, it would be the transition matrix multiplied by K2, and then you get the answer from the matrix. You wouldn't add the B matrix because those people don't get the option of choosing their seats as stated by the question. So why does VCAA add the B matrix 

[Lear]

Would one lose marks for adding a unit where a statistic is calculated?
For example in the 2017 Exam 2, would 72 eggs rather than simply 72 for Question 1ai be marked as wrong?

[PhoenixxFire]

Would one lose marks for adding a unit where a statistic is calculated?
For example in the 2017 Exam 2, would 72 eggs rather than simply 72 for Question 1ai be marked as wrong?

No. So long as it’s the correct unit of measurement you won’t lose marks

NHT EXAM 2, Q2F
Can someone please explain to me why the answer is 84. The answer I got was 82.

To my understanding, it would be the transition matrix multiplied by K2, and then you get the answer from the matrix. You wouldn't add the B matrix because those people don't get the option of choosing their seats as stated by the question. So why does VCAA add the B matrix 

Matrix B allocates the new members seats - they don’t choose their seats, so it’s still added. You multiply the T matrix by the state matrix, ending up with the people’s choice of seats, then you add B into their allocated seats.

[PopcornTime]

Do we need to know about hire purchase agreements for exam?

[PopcornTime]

Hi,

I need help with  question 9 from the networks section (attached below).

[VeryJuicyLemon]

Do we need to know about hire purchase agreements for exam?

No

[galaxy21]

Hi,

I need help with  question 9 from the networks section (attached below).

Which exam is this from?

[galaxy21]

Hi,
just wondering, will we loose marks if we write an answer without units? for example, if a question asks for the range of the temperature in a graph, can you just write, say, 20, or do we have to write 20 degrees celcius?
Thanks!

[Aaron]

Hi,
just wondering, will we loose marks if we write an answer without units? for example, if a question asks for the range of the temperature in a graph, can you just write, say, 20, or do we have to write 20 degrees celcius?
Thanks!

Yes. If you don't include units, you could mean anything. For e.g. if you write 20, then does this mean 20 degrees celsius or fahrenheit? Don't assume the examiner will put the pieces of the puzzle together themselves, cover all bases. This is a foundation skill which should be well and truly understood by Year 12.

[Lear]

I believe this sort of a grey area. Some believe that since things such as range/median/IQR are *calculations* it is inappropriate to include units. For example, if we were to calculate the median amount of humans in 10 groups and we got a decimal value it would not make sense to put units as we cannot effectively have for example 6.5 humans. I’m not sure about further but I have lost marks in methods for providing a unit when calculating the expected value of a probability distribution table that involved some sort of tangible object/thing.

[PopcornTime]

Which exam is this from?

Hefernan or however u spell it.

[galaxy21]

I believe this sort of a grey area. Some believe that since things such as range/median/IQR are *calculations* it is inappropriate to include units. For example, if we were to calculate the median amount of humans in 10 groups and we got a decimal value it would not make sense to put units as we cannot effectively have for example 6.5 humans. I’m not sure about further but I have lost marks in methods for providing a unit when calculating the expected value of a probability distribution table that involved some sort of tangible object/thing.

So is it best to include the units just to be safe?