VCE General & Further Maths Question Thread!

[clarke54321]

Hi everyone,

If a question in the Financial and Recursion module asks how many months will it take to fully repay the loan and the answer is 18.25, for example, do I round this up to 19 months (even if it says round to the nearest whole number)?

It makes sense for this to be the case as a loan can't be fully paid in those 18 months.

Thanks! 

[KDB]

Hi everyone,

If a question in the Financial and Recursion module asks how many months will it take to fully repay the loan and the answer is 18.25, for example, do I round this up to 19 months (even if it says round to the nearest whole number)?

It makes sense for this to be the case as a loan can't be fully paid in those 18 months.

Thanks! 

Yes, you would round up to 19 months. Only in this case because you can't pay the full amount in 18 months, as there would still be a balance remaining.

[clarke54321]

Hi Everyone,

How do you know if three mean smoothing is more appropriate than four mean smoothing from a table of data?

Also, is study score a continuous or discrete data value?

[KDB]

Hi Everyone,

How do you know if three mean smoothing is more appropriate than four mean smoothing from a table of data?

Also, is study score a continuous or discrete data value?

Three mean smoothing is usually more appropriate because it gets rid of less of the data. So if there are not many data points then three mean smoothing should be more appropriate. I think if there is lots of data then four mean smoothing would be more effective.
But yeah, if theres less amount of data, you dont want to get rid of more.

I'd say a study score is a discrete value, but then again, taking scaling into account, it seems continuous because you can have scores of like 47.2 etc. But to be safe id say test results/scores are discrete values.

[ayesha2011t]

Hey guys,

Can someone help me with this question? the answer is B

[clarke54321]

Hey guys,

Can someone help me with this question? the answer is B

Hi Moaning Myrtle,

Anyone please correct me if I'm wrong, but I believe this question relates to the old study design. Effective interest is still examinable in the current one, but it's applied differently from the previous Business Maths module.

[ayesha2011t]

Hi Moaning Myrtle,

Anyone please correct me if I'm wrong, but I believe this question relates to the old study design. Effective interest is still examinable in the current one, but it's applied differently from the previous Business Maths module.

Yeah, I had a feeling it might've been. Thanks for the help.

Also, are annuities and perpetuities a 'type' of interest-only loan?

[clarke54321]

Yeah, I had a feeling it might've been. Thanks for the help.

Also, are annuities and perpetuities a 'type' of interest-only loan?

Out of curiosity, where did the question come from?

Not exactly.

A perpetuity is where you invest a sum of money and receive a fixed sum of money periodically (ie. every month). The money that you receive is the interest that the investment is generating. In this way, a perpetuity is a type of annuity!

An interest only loan is where you periodically pay back the amount of interest the loan is generating. That is, you aren't paying off any of the principal, just the interest that the loan is accumulating.

In this way, the formula for perpetuities and interest only loans is exactly the same. The only difference is that with a perpetuity you are receiving the payment (which is the interest from your investment) and an interest-only loan you are paying the payment (which is the interest accumulating from your loan).

Just to be clear, an annuity is an investment that earns compound interest and from
which regular payments are made (ie. a perpetuity minus the regular payments).


Wow! A lot to take in. If this isn't clear, please ask me to rephrase it! 

[clarke54321]

Hi,

Does anyone know the real difference between saying that a time series plot is irregular or has no trend at all? Also, what is a secular trend?

Another question I have is the attached finance one. Could someone please help. 

Thanks! 

[TooLazy]

How would you go about this question?

[clarke54321]

How would you go about this question?

Hi,

I have written out some solutions. I'm not sure if it makes sense. But in any case the answer is 2 which is C.

[TooLazy]

Hi,

I have written out some solutions. I'm not sure if it makes sense. But in any case the answer is 2 which is C.

TYSM!!

[AhNeon]

If you apply a transformation to a variable, let's say 1/y=3.73+3.1456x, and the question asks 'what is the dependent/response variable', would you say y, or 1/y

[TooLazy]

If you apply a transformation to a variable, let's say 1/y=3.73+3.1456x, and the question asks 'what is the dependent/response variable', would you say y, or 1/y

I havent read anything that confirms it directly, but I was doing a trial in which I was given an equation with a transformed variable.
The question was asking for the r^2 sentence, and the answer had the variable written in the transformed state eg. Log(death rate).

[clarke54321]

I havent read anything that confirms it directly, but I was doing a trial in which I was given an equation with a transformed variable.
The question was asking for the r^2 sentence, and the answer had the variable written in the transformed state eg. Log(death rate).

Yes, I would also agree that it needs to be given in its transformed state.