Further 3/4 Thread 2014

[Snorlax]

Definitely going to be a few questions here and there throughout the year, so i'll get this started.



When comparing data and using the z-score, is it sufficient to say "This result is better because of the higher z-score"?

[Stick]

Be more specific.

[Snorlax]

Be more specific.

How so?
The answer the book provides is always "Because the z-score is higher/lower in x, it is better than y"

[BLACKCATT]

It really depends on the context of the question. For example, a question i came across while i was completeing practice exams required you to explain whether x or y finished earlier. With x having a higher time (that is, x's time being greater than y's time) which results in a higher Z score, this does not necessarily mean that x performed better than y. In this scenario a lower Z score represents a better time.

[Snorlax]

It really depends on the context of the question. For example, a question i came across while i was completeing practice exams required you to explain whether x or y finished earlier. With x having a higher time (that is, x's time being greater than y's time) which results in a higher Z score, this does not necessarily mean that x performed better than y. In this scenario a lower Z score represents a better time.

Sorry, but that's not what i'm asking.
I'm just wondering what's a sufficient way in answering a z-score question.
In the scenario you provided, to answer the question, would you answer it: "Result y is better because of the lower z-score"?

Stick - Did you mean more specific as in add the values of the z-scores in the answer?
 i.e "Result 'y' which had a z-score of 1.4 is a far better score than result 'x' which had a z-score of 1.7" etc,etc?

[Stick]

Stick - Did you mean more specific as in add the values of the z-scores in the answer?
 i.e "Result 'y' which had a z-score of 1.4 is a far better score than result 'x' which had a z-score of 1.7" etc,etc?

Yeah, that's what I mean. The key is to leave no doubt in the assessor's eyes. Sorry for my own ambiguity.

[Snorlax]

Is it possible to have multiple boxplots in one data&statistics page?

[Stick]

What do you mean? On a CAS? If so, I think it depends on which one you have.

[Snorlax]

What do you mean? On a CAS? If so, I think it depends on which one you have.

Yeah, on the CAS.
Oh, i'll look into it..

[Snorlax]

Could someone explain the process behind a question like:
2012 (exam 2) Q3 c)
http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2012/2012furmath2-w.pdf
What does the questions actually mean, and how would I go about answering

ALSO
2013 (exam 1) Q9
http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2013/2013furmath1-w.pdf
I think I have a general idea on how to do it, but getting nowhere..
Could someone provide the steps in solving?

Thanks!

*Figured it out.

[MagicGecko]

Could someone explain the process behind a question like:
2012 (exam 2) Q3 c)
http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2012/2012furmath2-w.pdf
What does the questions actually mean, and how would I go about answering

ALSO
2013 (exam 1) Q9
http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2013/2013furmath1-w.pdf
I think I have a general idea on how to do it, but getting nowhere..
Could someone provide the steps in solving?

Thanks!

Ummmm we need to know which module these are from or if its from the core.