VCE General & Further Maths Question Thread!

[Michael Scofield]

Hey guys, I was wondering if someone could help me with the question attached.

[Thorium]

Hey guys, I was wondering if someone could help me with the question attached.

Use this formula:
For y=a+bx, b=rS(y)/S(x), a=mean(Y)-mean(x)b
Where r is correlation coeff and S is standard deviation. So all you need to do is to sub the given values in.

So u should get b=-0.67, a=9.16. Therefore, the ans is A

[Michael Scofield]

Use this formula:
For y=a+bx, b=rS(y)/S(x), a=mean(Y)-mean(x)b
Where r is correlation coeff and S is standard deviation. So all you need to do is to sub the given values in.

So u should get b=-0.67, a=9.16. Therefore, the ans is A

Thanks a lot man!

[Einstein]

just a quick question - i calculated my lower fence at it was 26%. the lowest score in a maths test out of a class was 26, is this considered an outlier, or does it have to be below 26?

also what are some good resources to do when you have 3 more weeks until your sac and you've finished everything you have? I've done about 12 practice sacs , a+ , checkpoints all textbook questions don't know what to do to occupy myself for the next few weeks.

thanks

[~V]

just a quick question - i calculated my lower fence at it was 26%. the lowest score in a maths test out of a class was 26, is this considered an outlier, or does it have to be below 26?

also what are some good resources to do when you have 3 more weeks until your sac and you've finished everything you have? I've done about 12 practice sacs , a+ , checkpoints all textbook questions don't know what to do to occupy myself for the next few weeks.

thanks

Lower fence? Um.. i never heard of that lol. To see if 26 is an outlier, you must use the forumula Q1-(1.5xIQR)< x<Q3+(1.5xIQR). Just because the lowest value is 26 doesn't mean it's an outlier. To find out outlier, you must have all the other information (Q1, IQR,Q3). You should get two numbers that x must be between, if 26 isn't between the two numbers then it is an outlier.

[Thorium]

just a quick question - i calculated my lower fence at it was 26%. the lowest score in a maths test out of a class was 26, is this considered an outlier, or does it have to be below 26?

also what are some good resources to do when you have 3 more weeks until your sac and you've finished everything you have? I've done about 12 practice sacs , a+ , checkpoints all textbook questions don't know what to do to occupy myself for the next few weeks.

thanks

I had forgotten this so had alook at my last yr notes.

So if the value is spot on the lower/upper fence then it is not counted as an outlier. In ur case, 26 is not an outlier, however  any value below that is an outlier.

[Einstein]

ok it makes sense, because its a 'fence' anything higher/lower is outlier.

thanks

[The Brightest Witch]

Lower fence? Um.. i never heard of that lol. To see if 26 is an outlier, you must use the forumula Q1-(1.5xIQR)< x<Q3+(1.5xIQR). Just because the lowest value is 26 doesn't mean it's an outlier. To find out outlier, you must have all the other information (Q1, IQR,Q3). You should get two numbers that x must be between, if 26 isn't between the two numbers then it is an outlier.

Lower fence is just what one of the textbooks calls the Q1-(1.5xIQR) value and upper fence is what they call the Q3+(1.5xIQR) value

[MagicGecko]

also what are some good resources to do when you have 3 more weeks until your sac and you've finished everything you have? I've done about 12 practice sacs , a+ , checkpoints all textbook questions don't know what to do to occupy myself for the next few weeks.

thanks

Perhaps do questions from another textbook? When I did further, I normally ran out of resources, so I had 2 textbooks to keep me occupied. You don't have to buy another textbook, just simply borrowing it from your local library should suffice

[Einstein]

our librarys not the best, i have asked for the maths quest one and they didnt have it, only the ones our school uses really.

[calphanso]

This is a trigonometry question from the 2011 Further Maths Exam 1. When I solve the question, i keep on getting B, but the answers happens to be C. Could anyone offer me some insight on how I might be able to solve it?

Edit, The answer is B, I was looking at the wrong answers...my bad..thanks for the help everybody...

[Conic]

The assessment report says it's B:

[Einstein]

for the data, –1, 0, 3, 5, 7 the range is 8 either way you work it out, but in the further if the lowest data was -8, can the highest-(-)lowest change it to a positive sign?

[Thorium]

for the data, –1, 0, 3, 5, 7 the range is 8 either way you work it out, but in the further if the lowest data was -8, can the highest-(-)lowest change it to a positive sign?

Ok lets try. 7-(-8)=15. Therefore it does change to positive.
Is this what you were trying to find out?

[Einstein]

Yea, i knew that, but it was just the way of thinking about it since you can't have a negative range. All good, thanks